Just saw this topic. Looking at the "new" HF tire stand, I have to say I do not see how it could ever work without some major modification.
Here's a look at the "old" wheel clamp blocks:
The hook in the old blocks was what would grab the edge of the wheel rim. That hook is now a vertical element, so there will be no way to clamp the wheel in place with the new stock block.
If you install the mojo blocks (once he has the new ones ready) that will give you the lip that is needed:
I assume the new mojo blocks will be the same basic design resized for the new style vertical backstop.
I wouldn't worry about the blocks flexing backwards when you are clamping the wheel. The blocks in my Cycle Hill changer do that too. The blocks (with mojo block hooks) should allow adequate clamping force to keep the wheel from spinning when you are levering on the tire.
I'd take off the entire upper arm and just get rid of it. It will not do anything for you and will just be getting in the way. It's nicer to have a full 360 degree access to the wheel and tire. You can buy a solid steel 5/8" rod at Home Depot (that's where I got mine) that will fit inside the wheel bearings perfectly. Just drop it in through both bearings and it will sit close enough to 90 degrees to lever against.
I find that the demount end of the various tire bars, NoMar, Noscuff and MojoLever (I own copies of the first two) work very well for removing tires. OTOH, the tire
mounting end of these things tend to be a PITA. Maybe I have not been using them properly, but I have tried both styles of mount bar repeatedly and I find it
much easier to just lever the second bead of the tires on using MotionPro tire irons and milk bottle rim protection. (the first bead will always just push right on with a little lubrication)
YMMV