I have finished for now with the mast. The three pieces bottom, pipe and upper will be connected by two cross pieces of 6mm threaded rod at each join. This will make a mast 9800mm long, so I am in no hurry to finish. Painted them all and here is the final shots, firstly from a distance:
Then a close up of the bottom piece and boom jaw support platform (just sitting there)
And two shots of the 6500mm long tube, first showing the 3mm wall thickness:
And then a shot of it full length. It goes from nearly bulkhead one to the transom!