This is all my opinion, but hopefully sound advice.
I wouldn’t rush to increase your squish too much, if @ all, if I were you. I reckon that 0.75 mm is an absolute minimum but I’ve known racers run with less.
However, if you feel compelled, & your port timings should stand any minor effects, you should consider eliminating head gaskets by using thicker base gaskets.
Nice bike, BTW.
I bet I'm not the only person to squirm uncomfortably when they see the fuel tap left on.....
