Havent watched your videos yet. I will though.
Definitely use the stock 5.2. 5.2 works well for me despite having no field weakening. Maybe you have the skills to tinker and get 5.3 working… I dont!
EDIT: 5.3 works just fine. Just remember to disable phase filters in VESC tool!!! You will let out the magic smoke if you don’t!
Plus, the default FOC switching speed is 40khz. Motor is even quieter now, 10khz higher than the default on the 75/100FOC V1.
Im kinda cross posting between this and Jaykups hacked FW thread. More info there.
Keep us posted please!