Looking for anAfew AFV Track Painting Rig I Once Found...

A few weeks ago, I stumbled upon a web site where I guy was showing a little "rig" he setup for painting his AFV tracks. It was nothing more than a coffee can held in place with a block, and it sported a handle he could use to turn the can so that he could paint all the treads -- the treads being held around the can, conforming to the diameter.

For the life of me, I cannot find the site/post/whatever, and it's DRVING ME NUTS!

I'm hoping someone here has seen it and can recall where it is, and point me in the right direction. I'm considering making one of my own, and I just need to see his pics for a couple of reference ideas...

So can anyone catch that curve to left field?

Thanks!
Maury