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.
<a href="http://img75.imageshack.us/img75/4378/misc1023.jpg"><img src="http://img75.imageshack.us/img75/4378/misc1023.jpg" width="600" height="450"></img></a>
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.