Well OLCI was completed at 11.28am!
SEQ4 (for the SEQ geeks out there)

Update ref seat maps!!
In my previous post this morning I checked MMB 3 hours prior to OLCI opening and the seat map was open, There was only a block of 4 greyed out on the downstairs PE cabin and the obvious exit row seats upstairs. so it let me select 79C in the bubble.
When I did OLCI entered in all the info required, went through to select a seat page but came up with a message saying there were no seats available to choose as they had all been allocated, luckily enough it had saved my selection of 79C in the bubble, hopefully I can confirm this actually happened in my TR once I know my bum is on that seat when we are hurtling down the runway tomorrow morning!
So I think if your flying PE the trick is to grab your MMB on the morning of your flight and hope the seat maps are open, select your seat you want and keep your fingers crossed! y)