I haven't been doing many reviews lately, and I will try to remedy that.
You've probably seen or have one of these, but, if not, mine gets a lot of use, though I'm usually just playing around. My nephew, who provided the John Deere wheel and welded this up for me, uses his for real work. An old tractor or truck wheel that has some weight to it is obviously preferable, though I'm sure throwing on a couple of lead ingots or old dumbbells would add some stability to a lighter wheel.
I use mine for mostly for sharpening. I have also done some pounding and straightening, and I recently clamped the shaft of an old trimmer to make it easier to replace the clutch.