Posted for Bob Pastusek <rpastusek@htii.com>:

Scott,

I installed one of the door seal pumps hooked up to the vacuum side, and
wired it to only run when emergency dump was selected, but I think your
solution simpler and lighter. Good idea! I'd be particularly interested in a
metal check valve that could be installed in the engine compartment to
prevent manifold pressure from flowing toward the controller, and
specifically where you'd tap the intake manifold on a TSIO 550. I'd think
the other items pretty straight forward and simple?

Bob Pastusek