Hi Len
Yes, it is all done as far as possible, and Roger was/is building the dive module in 2014 and of course the props (and their motors) are in the moveable stern dive planes which is an interesting conundrum to resolve. The batteries are inside the sealable external scale keel, all in line ahead.
Anyway, once Roger has got it all functioning and I have that 4th part of the article I will include in MB – I thought that readers would think it strange if they didn't see a working model, working as it were, so hence the delay.
Paul.