Golf cabriolet hood fitment guide anyone????

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Hi guys, right my lil sis has got a mk3 golf gti convertible with an electric hood.

Basically the hood is shot,...she's seen some on the interweb for a couple of hundred quid ''not fitted'' so thinking of fitting it ourselves.

I'm a pretty compitent mechanic and have built a load of cars myself so don't think a vw hood should phase me !

Has anyone had any experience of fitting them, how hard are they to do, and are there any descent guides anywhere on the web, thanks chaps!!!