QUOTE(carcus @ Aug 8 2016, 03:18 AM)

I just want a neoprene wet suit material that I can snap on and take off without messing with the targa top operation. I am working on my idea, But I would never chop my top. Interesting thread though.
Your post reminded me of an old Amco ad I photocopied a long time ago. The ad showed a tonneau top and other accessories for the Fiat X1/9. A quick search found the ad online with photos, instructions, and comments:
http://xwebforums.org/showthread.php?t=26825The Amco top required a lot of snaps. If the top you’re planning is for parking use only then fewer snaps (and less drilling) should be needed.