Hi Frizzen
that's a good shout ! I might have to go back an do all the screws to be on the safe side.
So I have started working on the blade and push arms(?).
I had an arm 3d printed ages ago although the wrong scale. So some steel stock and marked up so I don't f*** up
I have ordered some swivel and rod end bearings to attached so I have left the arms long for now until I can measure
A bit of filler and paint and should looks good ( I hope !)