This is an art thing… absolutely has no load or work associated with the gears… Just want them to turn while handle is moved. This is a toilet paper holder… just for the fun of it. The shaft moving from left to right and back is all that’s important… and I’m already making mods to the linkage so the bearings ride in the slots so nothing “hangs up” while in motion. Will be adding pressed on bearings on the shaft that interacts with both slots and to mount the gears so everything is smooth moving.