Here’s a little guy how to assemble the parts and how the new system should work.
The included new hoes and 2 other frame parts please go in gooseneck. They are identical to old parts but slightly different. The holes fit. Of course, remove old parts. The new hoes automatically reach into the 2 rectangular cut-outs at the bottom of the new plate, which you have built into the new frame. The hoes close automatically as the spindle drive powers up the platform. And thanks to own platform weight, and weight of the load, the hoes remain firmly tied to the platform. When you lower the platform to support it, the heels start to loosen and you can pull out the gooseneck again.