@grec I've had difficulty responding to your email (they keep bouncing), but the good news is that the test firmware you sent me (2.0.0.22) hasn't crashed in the last 2 days that I've been trying to make it crash. :-/
Recall that I'd found a consistent way to make 2.0.0.2 crash within 5-10 minutes, so I think 2.0.0.22 is good for release. :-)
As I mentioned elsewhere re the Looper causing a similar crash, if I was right in thinking this crash was related to the Swing bug fix in 2.0.0.2, then hopefully 2.0.0.22 will be good for that Looper related crash too.