Max ERPM of Myxa

Energy consumption is not the main design driver for this. There is unfortunately no space for a bigger propeller. I do have another motor option (MN5208 KV340) with 22poles which brings the ERPM down to 84k/118k but this one isn’t sealed as nicely.

I am mainly interested in the Myxa for the configurability & telemetry over UAVCAN, as well as the possibility of customizations.
How well/bad do you think the Myxa would perform at the ERPMs of the two motor options I have? You mentioned the risk of instability under load. What would happen in such a case?