@EdW
Absolutely Yes Please Ed.
My last attempt at a craft like that included an O&R 23cc two stroke engine in the late 1960’s - and it did not end well, so it would be nice to have another go (not with a large petrol engine this time)
As a matter of interest, I have finally found those detailed 1/24 scale drawings of various armourments etc that could make a useful reference your Perkassa (or other MTB, MGB etc), so I will find a suitable tube and get them posted over to you.
Bob.