There don't seem to be many window seats in WT+ on the 747s

In Hi-J seatguru has 29 AK as having reduced width due to the folding table and "reduced window view" leaving only 4 window seats out of 30 in WT+. It's a similar case in Mid-J with 15A being next to the toilet leaving 6 window seats out of 36.

So my question is for frequent WT+ travellers on the 747s who prefer window seats - what are the chances of getting one at OLCI, or even by choosing in advance of that?