OK, been clearing up a few other jobs after finishing the Bolt! but while I had the Dremel out and dust mask on I started cleaning up the canopy frame. Where there is tape on the join line it needs cleaning down to a level surface if you want a great fitting glass. Always use a fresh sanding drum, worn ones will just create heat and give an uneven surface. The back needs at least 1/2”, canopy hoop all the tape and front around 1/4” removing. It’s also worth running your finger around the whole gluing surface to feel for lumps or strands of glass. Clean these off too, but don’t go too far into the weave as this helps the glue to wick in if you tack the glass with Slo Zap like me.