Can you attach a fixed jam type cleat to the base of the gooseneck track? Or if your using blocks for mechanical advantage, a ring fitting. I guess we should ask what type of slide do you have. There are many different types of cars made for slides that will solve your problem.
Well the track is a Tee track, similar to what a genny car rides on. It does not extend down very far below where the goose neck usually sits. Someone else suggested the track, maybe I can find a ring that would slide in the track.
What did you mean by a car could solve the issue?
SD, I have never seen an unstepped macs, so forgiv this dumb question, but does the mast somehow sit on that plate? The impression I had is that the mast step is like a shoe that sticks up, and the mast site on top of it, and the step comes up into the mast a bit to prevent it from sliding around on the deck. But I could be wrong, as I have never seen how it works.