It *is* a common problem. Our recently purchased '00 Boxster S is giving a lot of trouble with the top. Both mechanically and electrically. It's been in the shop twice already, and is going back again!
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'81 SC Coupe (aka: "Blue Bomber")
Member: SCWDP
Canada West Region PCA
The Blue Bomber's Website
"If it ain't broke...we'll help you fix it 'til it is!"