I'm looking for a cart solution to slide pins in and out to be able to work on them more easily. To work on EM heads, you can only access them from the back, and my pins only have about 4-5" of clearance between the heads since my collection is growing, so I almost have no choice now. For just removing legs, I used a non-padded wooden stool that's about 2" taller than the back legs. Prop up the back. Back legs off first. Slowly ease the back down (using your legs, not your back), and rock back on the back of the cabinet (that's what those little feet pads are for--even though they're missing half the time). Installing legs is reverse. With the pin upright, install the front legs, slowly lean the machine onto the front legs, and then lift the back up and onto the stool. A second set of hands helps, but I've done it many times solo with no problem.
I saw this dolly:
Already has the bent handle, and is cheaper than the Harbor Freight version, although it's 3" shorter. Longer is better, as it makes the pin less likely to tip.
I'm at work, so I can't measure it. Anyone know what the average width between the legs is? If this would fit, it'd probably be better as it is longer still, and the handle folds down for storage.