Roy,
A very nice project you have going there.
It's nice to see how you start off with a basic unit, then add bits n' bobs when either the need arises or you feel like making something.
I have no need for such a unit, as I have all little bits of holding tooling that allow me to do it all on my surface grinder, but I am sure, that if I couldn't go that way, I would be making one of these instead.
Nice ones.
John