Ok now we have a problem, ANY help would be greatly appreciated.
O'briens are happy to re-do the work with a geniune rubber mount/seal, problem is they cant find one.
I've rung volkswagen parts myself and they say the mount/seal (or whatever you call it) comes with the glass itself. Thusly the only way to get the glass to sit properly is to replace it with new glass (which o'brien quoted me at $720 fitted).
So now I'm in a pickle, I have a rear window mounted all wrong on my pride n joy and there seems little I can do about it (except smash the window and start again). If anybody has any ideas or can source me the genuine mount/seal on its own PLEASE let me know!!