Dave, thanks for the feedback. I thought about building one as well and you have confirmed that it's probably not worth the hassle. The factors have several solutions available, what I am struggling with is the voodoolab GCX audio switcher and GCX mixer. They are both 9VAC but have a weird 4 connector power supply cable coming off of a wall wart transformer. I'll drop their support team an email and see if they have any in house solutions for those pieces. The wall warts just don't integrate into a rack system well at all.
Thanks
Sean