Thanks guys. While all that is going on, I've continued to fill the canyons around the float struts and will post pictures of that when I'm done. That issue has changed my construction sequence somewhat in that I had hoped to complete the floats/struts as a complete, separate assembly before gluing to the plane but that won't happen now.
After a number of session of filling and sanding, I've completed the mounting points of the float struts to the fuselage to a more-or-less acceptable point and then glued on the floats, which offer up yet another round of filling/filing/sanding/priming:
Jockeying this strut into position opened up the seam on the float again:
This is turning into a long term project and won't be done before I leave for the UK next week to meet up with Red 1 and 2. Thanks for your continued interest and patience.
Thanks guys. Initial filling of the gaps has been done with stretched sprue. This was filed down and now we're into filling with primer and sanding. Boring stuff really.