I've seen people use this tool in videos, but every time I try it creates choppy edges that it won't cover. The more I "chase" the choppy edges, the farther they move away from me.

Here's a video of what's happening: Click Here[www.dropbox.com]


I have to use this instead (it comes in several sizes), but I think your mod could be much better, if I could get it work. Brush 1x1 Concrete