MM braking weirdness.. on my Hyper ST truggy

[Finnster]

Finally got my Hyper ST finished and have been driving it around testing it. All looks good except I'm having trouble getting the elec brakes to work how I like.

Basically there is very light braking action, then all of a sudden very hard brakes nearly locking the front wheels.

Setup is this:

Hyper ST truggy
4S/8XL/MM
7/10/3 diffs
Futaba fasst radio
brake curve linear
brk str 20% on MM
brk str on radio: 16%
Epas @ 100%
Brk Exponential on radio set from 0% then last time 40%.. no effect really.

Now, the weird part is if I go down one more notch on the radio brk str, to 14%, the brakes are basically gone. I'm not really sure how to dial more brakes in on partial brk w/o causing severe braking at the high end. I fiddled drawing curves in castle link, but just left it to linear as I wasn't getting it right. Plus I can easily dial exp on the radio.

I've had this MM on my CRT.5 I didn't have such an issue. Any ideas?
I'm really missing the feel of the manual brakes on my Revo. :(