Hi Richie,
The gentleman who designed the amp, Steve Dawson, can be found at the Vintage Modern forum ... he's on there daily as he designed the VM as well. On the menu page for that site, you will find a section for "other Marshall amplifiers", in which one section is dedicated specifically to the amp you have questions about. Might be worth your time to take a spin over there and poke around for a while ... if you have a question for Steve, he'll likely get back to you w/in 24 hours or so.
Here is a link to the site:
Marshall Vintage Modern Community • Index page
Have fun!