My 95 GS is targa chopped but is far from being finished. I would love to have a removable sealed top but after thinking about it for awhile, I convinced myself it would be more trouble than it's worth and that if I ever did finish it I would just keep it in the garage and not drive in the rain, or would I..hmmm lol. Only other option I came up with at the time was to take my friends spare/warped top(funny story) from his Supra and use that hardware along with some creative engineering to make it all work. As far as frame modifications, welded/shaved doors. Probably not as strong as it could be with "proper" reinforcements but better than nothing. Maybe one day I'll finish her up but I have other projects that need my full attention right now...

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=7&topic_id=98265&mode=full