fedex, glad you were able to find a 26'er....much fewer & farther between than the regular items.....
The height question I don't know about, but being maybe the resident expert on how to milk a bunch more out of an entirely beat-to-shit kettle, I think the wobbly part may very well be that the welds on the leg sockets are beginning to loosen & might eventually give out......
I've fixed some of these, but have none currently around that I can show pics of......
the fix, if you decide this is it after investigating more, is to either JB Weld them to solidify & shore up....or, to drill a small hole in the weld tabs & shoot a short sheet metal screw up into the bowl.....either will work, I've had the best result with the screws.....
Stabilize the leg sockets, the legs are stable.....