If you REALLY want kick-ass cork bases, also buy some Vallejo Pumice putty, and smear that around the cork. This creates a more natural looking rocky surface, rather than looking like individual big rock pieces. And it\'s *really* easy to do these bases.
This dread is done that way:
As for pinning, I dont even bother going down through the plastic base. I just pin into the cork. No problems so far. The cork is surprisingly co-operative with superglue. In fact, I find it can be hard to remove a figure from the cork base once the glue sets!
Jarrett