Late in the post, but this video really helped me, and it works very well.
I cracked one side off the Tulsa that came with my bike and had to ride while waiting for the replacement. So, I made a template along the break, folded my poster board, picked a height and followed their instructions. Turns out I had everything I needed laying around, but here's a list:
18- tooth blade
40-Grit Sanding block (I had 60-grit paper and wrapped a block)
220 grit paper
320 grit paper
Wet 400 grit paper
600 grit grit paper
http://www.youtube.com/watch?v=hQj05Db-C3c
I did NOT use a power sander, even tho' I had one; the hand-work did just fine for me and I got a really nice finish on the edge.
I hope this helps, or helps someone else. -s