My L-39 was flown off grass by the previous owner and he never mentioned anything about brake issues.

Please let me know here or in the other thread how it works out.
I have the same controller but running on 2s. Happy to go with 3 or even 4s if that solves the problem.

Also, still interested to hear if anyone has had success with the 4-plate brakes at high speeds on asphalt. So far no one has confirmed that.