Dan and Jalopy...thanks for all of your advice. Dan - we made some tension springs and cable which work great in holding the sides 'taut' while cruising down the road. Realized that my relief cuts weren't close enough to the edge and that is why my test pattern came out wobbly. Jalopy, ended up just putting a welt around the window and made the window a bit larger - which helps with visibility too!!!! It took all the puckering out of the back
Posting a couple of pictures of the finished top. It was an interesting process making a top from scratch with no patterns or old tops to look at. The boyfriend is a happy camper and I'm happy that we won't get drenched like rats next time we get caught in the rain - no fenders equals lots of spray inside the cab.