If you hurry up you can actually be delayed in long term as the insulin depot can get ahead of you - and you'll have to decrease the dose later. With Merry's BG numbers, I'd wait 5 days and evaluate before every increase.
They are still mostly high blues. I think you can increase now to 4.5 units. Or you could wait one more cycle and make it 8 cycles, but he needs that increase. The goal is green.