I believe part of what I'm looking for. Those look like the longer knobs but there are also two spacers that are roughly 1" round by about 2" long. Those spacers have a slot built into them that slides over the metal stm of the mounting gimbal of the ice shuttle. There's a good chance that if you have the bolts that go with them, you might also have the spacers. Thanks do much for looking, if you do find those spacers, let me know!