Well done Annie you are making great progress.
I want to pick up on one sentence from your blog, in which you refer to laying strips of 4mm ply over a first layer of 6mm:
I laid them out to cover the butts in the 6mm, but in truth, as those all landed on beams and stringers, this was hardly necessary.
I think you did absolutely the right thing, and I disagree with your remark that it was “hardly necessary” to cover the 6mm butts.
By coincidence, just this afternoon Marcus and I were discussing the failure of the plywood deck on the old scow I built 50 years ago. (I did not make the deck, the next owner did it). It was a single skin deck, with butt joins landed on bulkheads. The bulkheads are actually 3.5 inches thick so no butt straps were used. 40 years later cracks appeared at all these joins – and later, rot set in. Bulkheads are hard spots of course, and I think the joins would have been better between the bulkheads, and done with plywood butt straps. To make matters worse, the deck was then just dressed with canvas and paint.
I realise your laminated deck is not quite the same thing and a better proposition, and I have no doubts about your “workmanship” (gender error) – but from what I see now, I think it is good that you lapped over the butt joins with your second layer, and I do not think beams or bulkheads should be regarded as butt straps.
That’s my tuppence worth. I think you are doing a great job.