I use a 216x63 shock with one 2 mm offset bushing and some clearance modification on the yoke towards the seattube. Its still tight, and You carefully need to check that the bridge between the seatstays is not hitting the seattube when fully compressed.
Now its time for the results! I updated my firmware today (Loaded to BESST, and after upload it immediately loaded to motor controller without disconnecting) and did a battery attenuation test starting with 47% SoC. Full power available until 20% SoC, then appr. 400W between 20% and 10%. Below...
Today @Puschtrale received a new firmware for M510. @Kyokushin posted it on GitHub, You find it in the M510 official software folder. If You test it, please leave a comment here. I can install and test it on Sunday earliest.