MVVS
The is the only manufacture I use for my 2 strokes, (I have used K+B, OS, TT and Magnum) I have never had a problem with any of their stuff. They handle no nitro to any nitro (with shims!!!) I know you are only asking for information but they are great the engine the performs well and is relativly cheap to run and maintain.
I amagine the .15 is the same as their other stuff the smallest that I have of theirs is .36 combat and it is a stump pulling monster, it is my personal opinon that it is a perfect match to the Diamond Dust.