Trust me when I say this:
Lubing was the first thing tried to remedy this situation. I have used many different lubes including the ones that have been mentioned already and also very thin silicone oil etc., etc. Lubing is not the answer as it has been tried yet the problem persists.
Surely Roy and I can't be the only ones with Fei Bao jets that have an issue with the brakes. Would love to hear from someone who solved their issue with tight brakes on Fei Bao equipment.