Sounds like you're better at moving between instruments than I am.

I played anglo concertina for decades, then switched to melodeon when I couldn't get a new concertina I liked at an affordable price.

I got okay at the melodeon, but finally concluded my heart really was with the concertina, so I've ordered one that will be ready around August/September, and I'm relearning my old instrument (which hasn't quite fallen apart, but has very leaky bellows and some loose keys (it's already had repairs done to it, it's basically worn out.)