I'm highly interested, it looks to me like the CH200 is head and shoulders above the sub-$100 manual tire changers available at Harbor Freight (which I've used, not fun and will scratch the **** out of aluminum wheels without special precautions/add-ons). You said you were able to change truck tires as well as trailer tires on it. If it's capable of also doing car tires up to, say, 18", and does not scratch aluminum wheels, I may just have to make the investment on one. If I save $25 per tire mount/dismount, I would only need to do about 40 of em before breaking even.
Oddly an 18" off-road Toyota truck tire was easier than 13" ST-rated trailer tires. The ST trailer tires were just about as thick and heavy but being smaller meant they had to be pulled more. Got them off easier than on.
Am of mixed feelings with the more expensive Posi-Clamps rim gripper things I bought over their less expensive Dog & Cam Block system with an easy lever. Never used the Dog & Cam, but the Posi-Clamps require a 9/16" ratchet to mount and remove the rim and when one changes from one rim diameter to another there is a fair bit of trial and error.
The Dog & Cam Block system pushes the bottom of the tire up off the bead which is said to be a problem with stiff GL1800 rear tire, meaning one has to compress it to bring the top bead over the rim. But I can think of times that would help mount the tire, not make it harder. As I said, don't have that version to compare. But I could cut a number of short 1x2's to wedge between tire and bottom bead to find out.
Recommend purchase of extra pry bar tips, and the fancy tip for the long changing bar. A Yellow Thing. And I like their $6.95 right angle valve stems. "10mm" is the correct size for FJR.
And wheel weights.
Originally I was very unhappy with the balancer. My model has been discontinued because I'm sure I was not the only one. A friend made a couple blocks of aluminum for me with holes threaded for the bearing posts and fixed the problem.
The first picture shows the bearings not square to the shaft nor to each other. The next two have the reinforcing threaded aluminum blocks which holds the bearing posts square to each other. Alignment with the shaft was handled with a carpenter's square and a lever to twist the posts into place.