frameless glass fence on decking

So i finally managed to put together my deck. Looks awesome. I have to put in a fence though. I decided on frameless glass and found a good deal near Sydney. All arrived no worries. I set out a stringline, drilled my holes and fixed my spigots to the deck.
I was so excited I invited some mates over for a glass fixing party. It only cost me two cases of beer but I failed to get a single pane installed!
Guess what, my stringline wasn't as accurate as I thought, a couple of mm out and the huge glass panels don't fit!!

Does anyone have a sensible idea for how to fix this - not too keen on fixing the spigots to the glass first, placing them and then fixing - the panes are 45kg each and fragile!