You are right. Repair is expensive. The first time the head cracked, I sent it Moeck in Germany for repair. They replaced it. This one cracked also and I had it repaired here.
I’ve moved on. The plastic Aulos is fine. I don’t have “Recorder-Buying Disease”.
As for JamKazam. It works with very little latency but only if everything else in the house is turned off. JK and Zoom conflict. If my husband is on JK and I join a Zoom session, his JK crashes. We’re still experimenting.