Hi Oldstatesman,
That is a neat trick you propose. Can't wait to try it out!
Have fun
I can't take credit for this ...there is a whole thread in the Strategy Section here...
https://forums.galciv2.com/?forumid=347&aid=149365#1183491
BTW, you can extend this to Miners, Constructors, Frieghters and Troop Ships too.
I like to build some of my Asteroid Miner ships with small hulls...they get 8 Hit Points. Later on when I get high miniaturization, I can upgrade them and add an engine, a Laser or two, and maybe some defense....then they are not sitting duck targets and can be used to attack undefended enemy aI Troopships, miners, and Trade routes. Kinda like GC 'Millenium Falcons', lol.
Of coarse, the maintainence fee on them is higher...but by the time I can do this I am making a lot of credits anyway.