Yes please! I am making a table which rises out of the floor. The table itself is fine (converted from a hydraulic mortuary trolley) but my attempts to open the trap doors above it with horizontal blocks and tackle are not going too well. I would need four with about 25cm throw and able to pull at least 300N.
I am not a member but I can get a member to vouch for me if necessary.
Oh and said table could also benefit from flaps at the side which extend once it has risen. I don’t want to be greedy but “bin loads”…
(Off-topic: I have also bought a second-hand car hydraulic roof pump and actuators to play with, but then discovered the hoses aren’t compatible and it’s all a bit hard. People don’t seem to repurpose these - I wonder why…)