I don't get what you're saying about stuck bracket cups also re^ doesn't the front wheel always have to come off to use it?
(when working on old steel bikes) sometimes (parts are stuck and) force is necessary. you can put your full weight on this one, the others you showed will just collapse.
either the front or back wheel has to come off, yes. is that a problem?
(when working on old steel bikes) sometimes (parts are stuck and) force is necessary. you can put your full weight on this one, the others you showed will just collapse.
either the front or back wheel has to come off, yes. is that a problem?