There has been a big break in proceedings. Heat had effected the paper on the forms and this required re gluing with spray glue.
Forms 9 and 11 were a little tight when sliding over the strongback. A quick tidy up with the jigsaw saw this fixed.
Forms 9 and 10 were cut to insert coaming recess.
Once all the forms were spaced correctly it became apparent that the strongback was 1.25 inches short. Pieces were cut from scrap to rectify this. These were glued on and will dry while I am away fighting fires in East Gippsland.
Glue dried and job screwed length now matches spacers and forms. Thanks Mr Pythagoras.