Denny, that unit sounds like it is just what I need around here.
I mount tires, with very few problems, by lubricating the beads of the tires with detergent and using a rubber hammer to stretch the bead over the rim. I do the pounding alternating on each side where the bead is stretched on the rim. It works with everything from a wheelbarrow tire to a 16.5 truck tire. I find that the hardest tires to mount are tires on super wide rims.
I have been meaning to go to the tire store and find out what they use to lubricate the bead, but after I am finished mounting the tire of the moment, I promptly forget.
I have been using a couple of rounded off broken springs to demount the tires, that is work.
Bob