Use slanted surface.locate point with  preferably back tip.offset tip maximum be around 40 degrees.
Line thickness will start before the little tip curve.

It's made out of wood, the front tip works between 40 to 165 degree angle, the back tip works from 0 to 40 degree angle, it has all most no self caused drag, the tips are thin and plai.tv team figured out a cool way for it to work with gloves on.

Use atleast 38 degrees slanted screen surface for more tilting comfort.Locate point with preferably back tip because in case of e.stylo 1.0,the corners of the back tip are less curved than that of front,giving more pin point control.Slightly offset back tip,maximum be around 40 degrees from the screen surface.
Line thickness will start before the little(very small) back tip curve.
It's made out of wood, the front tip works between 40 to 165 degree angle, the back tip works from 0 to 40 degree angle, it has all most no self caused drag, the tips are thin and plai.tv team figured out a cool way for it to work with gloves on.The small tip end which is  nearest to the exposed wood part is front tip end and the other end is back tip end.See one of the large side view of e.stylo for better understanding.
Till now I saw Dagi,Jot-Pro,oStylus,aPen by ByZero etc.Pogo,grifin,etc are not for pinpoint accuracy.But e.stylo is the best capacitive stylus for any capacitive Screen.The only second best not so good option is Jot-Pro.Dagi Styluses are not good at all.The disc is not movable around its own axis in Dagi unlike Jor-Pro.Also aPen is also not so good option and not so fast and comfortable.
My advice:
Use back tip for both new 1.1 version and older version for fine sketching.

Anyway,here is my latest update on Estylo:
Estylo new 1.1 version launched on kickstarter recently!
My vote definately is for Estylo 1.1 from Plai for sketching.I think , E.stylo  is indeed with no doubt the most accurate capacitive stylus available in global market,which works without any direct electronic support or radio frequency support.But u need to get use to the holding angles and once u get use to it, its very easy.It also works with gloves on so that u can finally rest your hand comfortably on screen without unnecesary irritating inputs on the screen and it’s ideal for sketching,but may not be good for writing.Its better than Dagi, Adonit Jot-Pro, OStylus, etc because the discs of those styluses while touching the screen gives unnecesary lines or points on the screen near the aim or centre point, most of the time.Also while drawing vertical or horizontal lines u get the buttery smoothness of the capacitive screens with best accuracy possible on a screen.Also till now, By-Zero’s aPen and other styluses for which By-Zero licenses technology or sells aPen with different brand names is also not so good option and not so fast and comfortable. The problem with APen stylus and styluses for which Apen licensed technology is that they only work with Few note taking apps and only with Studio Basic sketch software which lacks important features like copying many photos, Zooming for making fine lines, eye dropper tool, smudge tool, colour blur tool, Dodge tool, lighten or brighten tool, etc.And it does no support other sketch Application.Otherwise if u want an electronic stylus for very light sketching without zooming or other features or if u have no problem using a very limited compatable note taking apps , aPen will work out for u. Also your screen will not accept any other input other than the By-Zero’s aPen once aPen is being switched to on mode until it is switched off.
Please see

http://www.kickstarter.com/projects/plai-tv/estylo-11-magnetic-dual-tip-capac...

and

http://plai.tv/

Also,
Please visit the following videos on YouTube:

http://m.youtube.com/index?desktop_uri=%2F&gl=IN#/watch?v=tIgUjVVVhFc

And

http://m.youtube.com/index?desktop_uri=%2F&gl=IN#/watch?v=v0hrvA9ILcU

And

http://m.youtube.com/index?desktop_uri=%2F&gl=IN#/watch?v=UZqmBE_8bzY

The second video I posted illustrates the accuracy of Estylo when drawing thin lines at the end of video.If possible, just zoom to see the thin lines being drawn accurately.

Well,This is the way to use Estylo

I came to know and analysed some important following points on e.stylo.
Important instructions for highest accuracy of e.stylo in sketching:

Use atleast 38 degrees slanted screen surface for more tilting comfort.Locate point with preferably back tip because in case of e.stylo 1.0,the corners of the back tip are less curved than that of front,giving more pin point control.Slightly offset back tip,maximum be around 40 degrees from the screen surface.
Line thickness will start before the little(very small) back tip curve.
It’s made out of wood, the front tip works between 0 to 75 degree (Approximately) angle, the back tip works from 0 to 40 degree angle (Approximately), it has all most no self caused drag, the tips are thin and plai.tv team figured out a cool way for it to work with gloves on.The small tip end which is  nearest to the exposed wood part is front tip end and the other end is back tip end.See one of the large side view of e.stylo for better understanding.

My advice:
Use back tip for both new 1.1 version and older version for fine sketching.
For starting a line from an intersection of 2 lines,u can use e.stylo tip in flat position without need for any offset.

The front and back tips can be operated at various angles from various corner points.One of the corner point is for precision sketching as in the second video link I posted.

Well Estylo is ideal for sketching on ipad but not for writing.For writing u need a stylus tip which can move really very fast while moving along short curves or short distances,compared to that in the case of sketching.Acually, till now no capacitive stylus without battery powered network interface is good for writing.For writing battery powered styluses like By-zero is good only if u really don’t need sketching app features like copying many photo layers and images/photos from iPad photo library,zooming for making fine lines, eye dropper tool, smudge tool, colour blur tool, Dodge tool, lighten or brighten tool, etc. And if u have no problem using a limited number of 2 or 3 Handwriting apps compatible.Also while using By-Zero u cannot charge your iPad.Similar electronic styluses comparable with android devices are available online now.By-Zero is made only for iPad till now.

http://www.youtube.com/watch?v=YCim-QkDME0&feature=youtube_gdata_player

This video illustrates the accuracy of Estylo when drawing thin lines at the end of video.If possible, just zoom to see the thin lines being drawn accurately.
Estylo is compatible with all capacitive screen devices including iPad.