Bigmet wrote:I would guess this puts a lid on the likelihood of an OO version anytime soon, as the order of magnitude greater moving mass that the larger scale implies will demand a mechanism redesign. I considered this type of device for my own OO application, and it became serious engineering that would need interlocked operator safety provision among other aspects: sufficient for me to realise it was out of scope as a DIY job.
I am sure a counterweight assisted version would be practicable in OO, the fact that the prime mover is the operator solving the interlock problem Friction prevents the moving mass getting out of hand on its own account! I am thinking along the lines of drawer handles both ends of each shelf for operating/moving and a small bolt attached each end to the fixed frame engageing a brass or similar plate on the moving part to provide locking/alignment. Getting 10 shelves maybe difficult according to the maximium length of drawer slides you can obtain, I only just about managed 10 in N. Of course some other means of a sliding vertical alignment may be possible. Definetly use bags of sugar instead of stock for testing like I did till your satisfied Thank you for your kind comment, nothing is impossible but it might take a few years!!