I wouldn’t try to over-engineer the galley hatch lift system (speaking as an engineer who always likes to over-engineer everything). CLC supplies 20# pistons. I and many others have discovered that in cooler temps, the 20# pistons don’t exert quite enough force (as predicted by the ideal gas law, with pressure proportional to temperature in a fixed volume) so I replaced one of the 20#-ers with a 30# piston. that solved the problem.