[jerry w]

Hope I am not to late with this last piece of advice:

I found using a ceramic or glass cutting blade in my reciprocating saw worked the best. Remember you are cutting through resin and GLASS. It had the finest teeth and made a real smooth cut with out chipping out. Masking tape is a must, and I also finished the cut with a sanding drum on a dremel tool.

Good luck take your time on this.