Fly Angler- I make a dam of masking tape around the perimeter and pour the epoxy about and 1/8" thick. Plenty of contact surface area, no need to cut a groove. Adding some epoxy filler (micro-ballons) adds bulk and helps self level.

I have also considered using single edge injector type razor blades for the cutter pieces...They tend to be brittle and often break on small radius bends, but I like how sharp they are.

[This message has been edited by kengore (edited 19 April 2006).]