DSX Trailing edge: Stuck in the strings

I'm trying to get a working DSX Trailing edge motion that can hit at least 180 bpm on all strings. I do the DSX motion most naturally, but with a leading edge grip I can get only to about 160 bpm on a single string tremolo. I tried the trailing edge grip and it got to about 190 bpm, but only on the low E-string with the tall mouse form. I modified the form a little bit and got something that almost works on the other strings, the pick just seems to get stuck on the strings. I tried to find any other players that would use a similar form like me, but didn't find anybody. Is my form incorrect or do I just need to get used to it with time? What should I concentrate on when practising on this?