Hi! For my finally year design project, I intend to try and solve the problems with existing shower bathing aids for the elderly and disabled. I won't go into details of what problems and how, etc, but I will give you an overview of the mechanism I intend to use. My product is essentially a chair attached to a motorised mechanical "arm" that has to lift the user over the side of the bath and inside. The arm could be attached to the wall alongside the bath, with support frames (e.g. http://www.geberit.co.uk/en_uk/targ...tallation_systems_1/installation_systems.html) concealed in the wall. The problem I want to solve is to figure out how to lift the user (up to 150 kg) in the most effective way possible. To try and solve it, I've looked at other products that support a heavy weight at the end of a bar. Things like http://www.manfrotto.co.uk/magic-arm-with-quick-release-plate http://www.steadicam.com Can anyone help me by suggesting a method/ mechanism to deal with this sort of weight/ moment at the end of a bar? Thanks!