[sdiy] Frac dimensions?

[Tim Parkhurst]

Hi All,

I'm fiddling with a layout for a Frac panel, but I don't currently own
a Frac Rack. Can someone tell me the open distance between the panel
mounting rails? In other words, I'm looking for the "safe area" where
components can mount on a panel. Thanks to the drawing on the Blacet
site, I know the overall size and where the mounting holes are, so I'm
just looking to verify the opening between the rails. In inches or
millimeters is okay, but please be accurate (I'm looking for something
like "4.35 inches" and not "a little over 4 inches.")
:-)

Tim (yes I know I need to buy one, but I'm impatient) Servo
-- 
"Imagination is more important than knowledge." - Albert Einstein