I got a set second hand with the wobbly kingpins everyone talks about. They came with an extra set of kingpins so I tried those out. Still wobbly, so I emailed Lurpiv, who asked my address.
After waiting a couple weeks, I took the inverted kingpins, reverted them and cemented them into place. A couple weeks later I got a set of new kingpins from Lurpiv which are identical to the wobbly ones I originally started out with.
The cemented king pins don’t wobble anymore, and the trucks are nice, yet I find myself back on Aces anyway. Aces seem to turn a little more to my liking, though I like the height of the Lurpiv and that I don’t get wheelbite on the Lurpiv.