xt8 1521 6s mgm brake setting help it!

[masense]

hi every one!
My E REVO is extremely smooth with mechanical brakes.
When I return a throttle, XT8 strongly takes too much brakes.
What will you do?
Cannot you but make it mechanical brakes?

neu1521 6s mgm 16018 cc ubec
pinion 17/48
rear centerdiff front oil 10000 30000 10000
futaba 3pk super
mgm Para-meter
a 3
b 4
c 4
d 1
e 1
f 6
g 6
h 1
i 2
j 1


Thank you by good advice