Thought about choppin' the top, but I am keeping it in the F Prepared class in SCCA autocrossing. If no one else has replaced a roof I am going to proceed with this plan. Position and tack weld a rollbar then drill out the spot welds on the current top with the big hole in it. Next,see if the 'skin' will come off. If so, finish weld the rollbar. If not, I will cut the pillars and then weld on the new top trying to keep things aligned.