A couple of dumb questions about going from fixed to free...

I think I'm right in saying (and I'm holding the fort here til someone better arrives) don't drill your frame. Just buy the appropriate brake with nut and bolt attachment as opposed to the Alan key - recessed nut system you describe.

Cheers for the reply man, but I'm pretty sure I wanna run these brakes - I have them already, they are fairly decent dual pivot brakes, and drilling a hole is gonna be a whole (geddit?) lot less expensive than buying a new set of brakes.

I've read a lot about people drilling out their brake mounts, but the only problem is not being able to drill from the underneath!