I really like the Cirrus 620...one of the reasons is... it's one of only a few hardside TC that can be installed and used with the tailgate in closed/up position. Have you had any issues with regard to the front over cab "Stargazer" window? I've read issues with sealant gaps, leaks, flying off, etc? I believe it is only chemically mounted to roof (Silkaflex) with no fasteners used. Also, how does your multi pro tailgate work (if you have one) when used as entry/exit step? Would you purchase the 620 again? Thanks!