If you're packing it around to shows I would seriously consider modifying it so you can carry the cabinet and machine separately. Maybe remove the lift and put a box in the opening so your machine and case bottom can just drop in. That way you're not hauling all the weight around at once. It may be possible to do and still be able to return the cabinet to original if you want at a later date.
I don't get around as well as I once did so I tend to look for easier ways to do things.
Rodney