I got this compilation cd of Milt Hinton's work ("Milt hinton - The Judge at His Best" which are a bunch of chiaroscuro sessions from '73-'95. On the cover is The Judge bowing his bass. But if you look at his end-pin, it looks like a large caster wheel on a rod. What is that? I'll see if I can scan it it or dig up a photo online. There must be some kind of locking mechanism on it like one of those locking casters. Does anyone know anything about it? just curious. I can't imagine it being all that great if it's a solid rubber wheel - too much stress on the end block and no shock absorbtion by the wheel itself... or am I mistaken?!?