: Thank you all for your helpful responses. I think I will make the cut by hand
: with a small japanese hand saw or similiar. It is a daunting thought,
: cutting a hole in this thing, but I suppose no more daunting than
: everything else so far - it has been such an amazing learning experience
: for me. I almost feel I got in a little over my head with this project,
: the cool thing is that it has forced me to finish it. I'm looking to
: finish it in the next few weeks, I'm about 13 months into it so far. I
: attempted to input a picture, if that doesn't work there is a link below
: to a photo. Thanks everyone.

Nice job and I can see the reason for the fear

Bill H.