Eric,

Cut the bottom as needed, it can be reshaped and good to go again.  Usually use 5/8" or 3/4" ply to make them. But had that 7/16 stuff on hand.  Want to thank the other swap participants for not posting while I was struggling to get my story and pics put together.
Had it all done and just insert file into the project description area for new project post and would. have been done.
I saw 5 MB file limitation and mine was over 24 MB.

daveg, SW Washington & AZ