[ruredy]

Maybe flimsy isn't the right word, more like questionable, (Just My Opinion nothing against PlumQuick). I know they work and have seen carts with them. I'm just not a big fan of any spindle lift and making them adjustable only adds to it. Spindle lifts are ok on tractors and riding lawn mowers, things that run slow that don't have suspensions. They really multiply all the stresses on suspension and steering components because of the added leverage associated with them. (wheel on a stick) This will cause premature failure of those components.
Glad you figured out your clearance questions