We're gonna broach it, mainly because we don't have access to a EDM.

Yep, it's a 4 inch wheel, and there's a lip on both sides, 1/16th by 1/16th. We've used that size lip for the last 3 years with amazing success (as in never needing to change out the roughtop for the entire season!)

I've always wondered if I am the fastest... in FIRST at least. Maybe we should have some sort of competition...