You could probably relocate the msv 2 a little higher, cut the lever and tap the holes a tad bit higher and that should work. I do have a Micro rock in one of my custom frames, actually the first sleeper I did!
If you use 90* LP fittings (from cyberave68) you can make the msv-2 lower than in this one and keep the lever longer too, which will make the trigger pull light. This frame rips too even with the short lever.
and in case any one is interested, this frame is for sale/ The asking price (I stress asking) is $400 as shown with lpr and asa.