yea all i can say is dear god don't nick any of the supports or try to mount it to far forwards.
there's a lot of doubt because of the home sunroof installs that have appears on JC over the years, usually ends up writing the car off after some numnut cuts through a support and the roof bends/caves in.
Thus Sabbath's shovel and tarp comment
roof held up with shovel and tarp to stop leaks
as a previous member did years ago haha before the cops busted him.
If you can do it properly, then good on ya, if not well another one chocked up on the statistics.