cool. Ive never seen this before. I'd imagine it wouldnt be that bad to do just time consuming and fiddley. If you have the head liner off, where the interior lamp goes and the electric sunroof switch goes they have like a metal bracing around the edges to keep it supported. I'd imagine you'd need to do something similar like this or better as it would be a pocket in your roof and potentially carrying weight or having a stupid passenger using it a a grab handle.
On that note maybe better fixing it to the actual roof instead and triming the roof liner very tidy around the pocket.
Sorry, im thinking loudly here but i think this is an awesome idea and i'll look into it a bit further. Not hard to get a buggered head liner and experement. Let me know how you get on or any other information you gather.
