Roderick’s top clamp is a very good idea.
Another job on the “round tuit”
FWIW, I tapped the far end of the moving jaw (M8) , made up and fitted a M8 stud, with a knurked “knob” so that the jaws can be better aligned when clamping short ends.
My swarf catcher is a plastic tray that just fits into the metal shelf. After sawing is finished, the tray is removed and the swarf brushed into an empty baked bean tin, for disposal.
Howard