Oh, where to start?
1. You have a beautiful, shiny GRP hull, pristine and perfect and then you have to bash huge great holes in it to fit propshafts and rudder tubes, hopefully in the right place. ?I hate that bit.
2. I also hate aligning motor/mount/shaft etc. ?It always seems perfect when I leave everything setting over night. ?The following evening the shaft is stiff as a stiff thing and the motor's sagged over to one side and the shafts (for multi-shaft boats) are anything but parallel! ?I don't even like to remember what it was like!
I actually don't mind the soldering up of bits and pieces. ?Mind you, I never used to, but I have got to grips with it now, also wire bending. ?My secret is jigs, not a little dance (though resting a hand on the hot end of the iron can lead to such 'performances') but bits of timber and ali to hold things in place while soldering is going on and also to help form curves and bends.
Best of luck with your chairs
Mike