The problem is back. I haven’t flown in some time, went to the field today and the throttle was broken again. Spent 30 minutes trying to arm, reconnect, etc. I did test the motor at home a week ago, and I was able to arm the throttle. No such luck today. I checked the firmware, updated from 5.7 to 5.9 (SAMD21 version) but no change, except it now was also showing battery at 0% instead of 90. Downgraded back to 5.7 for now.
I took the throttle apart, and it looks like the microswitch is slightly bent/torn AWAY from the circuit board:
I was able to squeeze it back in and then it armed easily (two taps in v5.7).
Perhaps it got caught by a line and bent due to the enclosure hole being quite large?
I don’t trust my soldering skills to keep me airborne, but I will try to get it fixed at a local electronics repair shop. Is that side-mounted microswitch common? Is there a better alternative that would fit the enclosure and survive my muscular gamer thumb (or occasional snags)?