TMT,
I have one too. I would not recommend casters.
Except for very light stock, the pulling & overturning effort
is too great. I use it frequently.
A set of 90 deg dies and an offset male (upper) are best
to start in various lengths for box folding. The V opening
is another choice. Small stuff needs small V's.
I broke the handle casting doing the obvious. Split in to.
I carved a new one out of steel.
Send me a note and I'll return a pic to you.
RichD cmsteam((at))speedfactory((dot))net