I've read this thread with interest since my BF cab is nearly done.
But I don't understand the issue with the wheels/Handles?
As far I can tell, they are parts will be used all the time... Kinda like wheels on a car, would you expect the manufacture to replace all your tires, even though you've driven and used them? No. So whats different about handles failing after use?
You don't ever want to replace a car tire, never drive the thing. You want to make sure the handle and wheels dont die at all, dont move the cab.
I mean - if the handle failed instantly, that would be totally different...