Karl Townsend wrote:
You'd best move up to stainless fasteners. AL does this to steel.

But it's not the steel that's the problem - it's the aluminum. For
example, one of the fastenings is a through bolt with a nut. I had to
use an impact wrench to loosen the bolt shaft in the smooth hole!

This is a nice tool, but definitely not made to be repaired. I think
I'll send them a note! Polite, but pointed.

Bob