TnAndy: I looked at designs similar to the one you use but stuck with this design for the first few as I like the lower profile. The tops on mine will open up like a cellar door so we can get inside if we need to. I do need to get wheels on them, though, but want a design that allows me to use a single set of wheels and just move them from tractor to tractor. I've seen guys using a dolly but I think there's probably another way to do it.
Yep, I understand David. Difference strokes for different folks ! I like being able to walk thru a door rather than stoop over so much. Sign of my age, I guess....ahahahaaaa
The wheels on my are removable. They just happened to be in the 'on' position in that pic, as I had just moved the tractor.
I bought some cheap ones from Harbor Freight with a 5/8" axle hole, then welded a 5/8" bolt to a piece of 3x4" x 1/4" thick plate, drilled some screw holes in them, and mounted to each tractor. I 'jack' up that end with a shovel, and the wheel just slips on/off the 'axle', held with a 5/8 nut, as needed. I take them back off when the tractor is in place so there isn't a gap under the bottom of the 4x4 runner.
Someplace on the internet ( don't ask me where ), I saw a rather cool design that had the wheels mounted to a pivoting, sort of offset bar....kind of a cam action.....you cranked it one way to lift, and move, then back the other way to lower into the resting position. Looked like it was built out of 1" square tubing, with a couple of funky offset angles in the length. Wouldn't be too hard to copy, I'd think....