Thanks Shane (and guys) -

When we bonded your rear hatch piece we left the "lip" at the top where the glass would lay in; we left it open.... so the Lexan slips in there perfectly.... as you know the hatch has a natural "bow" to it... the Lexan being flat and a little flexible, I installed a metal clip on the bottom/rear edge which naturally "bowed" the Lexan up tight in the rear corners - the only thing left after that were the sides - I then scuffed the Lexan with 80 grit - 1 1/4 all around the perimeter and just used glass urethane (fast dry) and clamped it all for 24 hours.... seems like it's holding really well - but I havent had it at speed yet.... but it should be drawing it tighter at speed as it tries to "suck out"... If I need to post a pic of the bracket under the hatch I can certainly do that for the group for later reference if you think it would be useful?