Re: New Spider- hood problem.
I had a 911 (964) convertible, & the roof was a complete pig. It got to the stage where I didn't want to open the thing, for fear of it not closing properly. There are 2 motors/gearbox's that open/close the roof, one for the left, one for the right. If they aren't completely sync'd, one side would mate with the top of the front screen, the other wouldn't, & sat up proud by a good few mm.
I have no knowledge of the Spider mech, but the symptoms do sound familiar.
Oh, & as an aside, I was told by an independant Porsche techy that the roof motor & gearbox was actually an OEM made by BM bloody W!
Hope you get yours sorted.