And two more words: "March Pump"
Granted, a keggle is a pretty dang heavy thing on its own. But a full keggle vs a full kettle? The bulk of the weight is still the wort and not the vessel itself. You shouldn't be lifting these things full!
If anything, take a step back, look at your process, and ask yourself why you had to lift that full keggle. See if you can make some changes there and avoid the need to move a full keggle, rather than trying to make moving that full keggle easier.