the builds looking pretty good there , but not sure how the hell all these roofs are cracking, I do hope you havent stuck the roof on with sikoflex like some other builder once did with his 360 rep, that was a totall cock up, if you use bonding paste there will be NO issues, Ashleys demo car and my cars were fine, my last 360 did 12k miles I live up an horendous bumpy road, and drive like a bat out of hell and never had any cracking at all, so its seems very strange?