I'd rethread. I had to do it with my hatch (Zx3) and it wasn't that hard at all. Don't know about the wagon, but it had to be done in a limited time on a moving assembly line so it shouldn't be hard to do in your driveway.
Hatch Nation #13 : Rally Revolution #13 : ROTM Jan '13
It's Bryan, not Brian
RSVT-170 Build in Progress
Derusting Rusty Build in Progress