Just a quick update. I have mostly stripped down the spare red mower I bought and noticing that its body and parts generally are in better shape will have decided to rebuild that one instead of the green one. The work I did on the green one was basically just respraying and that needed to be done anyway if it is to go into storage. I will pinch the motor and cutting disc off it and then pop it on a shelf. Will post again when I've repainted old red and have it mostly re-assembled.