Thing is, If you rolled a golf with a welded sunroof, the panel could shear

which is a little worrying.
I've been threw all this with my clio, as that has a sunroof and i wanted to remove it. The only way i would of been able to do so, would be to replace the roof skin with a sunroofles jobbie. I decided against as it was too costly. The dude who was going to do the job said he wouldnt advise welding a a sheet over the hole as it the worst did happen it would get messy.
I think i'll just strip my Mk2, and leave the sunroof in and not bother with a roll cage.