Hope you are doing well and having a great week!

Hardware: Starling 2

What I am trying to do:
We are developing autonomous flight missions using the Starling 2. During testing, one original motor (1504 3000KV, PN: M10000633) suffered physical wear on the upper bell (stripped screw hole causing vibration). Additionally, our original battery was damaged.

Since we lack micro-soldering capabilities in our lab, we strictly prefer a solution without desoldering/soldering motor phase cables. Due to international HAZMAT shipping restrictions for LiPo batteries to Europe, we also aim to source battery replacements locally.

Questions:

1. Bell Replacement Compatibility: If we purchase the 1503 2900KV (M10001231) replacement motor, can we swap just its upper bell onto our existing 1504 3000KV stator/base without shaft/magnet alignment issues?
2. Mixing Motors: Can the PX4/autonomy stack handle mixing one 1503 2900KV motor with three remaining 1504 3000KV motors without causing flight instability?
3. European / Third-Party Alternatives: Do you officially support any commercial alternatives (e.g., iFlight, T-Motor, BetaFPV)? How significantly would transitioning to 4 identical third-party motors impact factory PID tunes on the VOXL board?
4. Battery Specs for EU Sourcing: What are the exact discharge specs (continuous/burst C-rating, chemistry/LiHV vs standard LiPo) for the M10000538 battery so we can source an equivalent locally in Europe?

Thank you in advance for your help and support!