where I am so far:-
Utilizing all of the above hints and tips I have installed the prop shafts and A Frames.
The legs of the frames were secured inside the hull using sections of tube pushed down over the legs and then epoxied into place using "Z-Poxy"
I would have drilled and pinned them but the appropriate drill suddenly went blunt!! The tube sections were a desperate alternative which has worked as well. (I hope)
Thanks to all,
PS
The "E-poxy" is taking a long time to cure, where it is in a "lump" over the "A" Frame fixing?