SMI Silent Partner Brake Control Questions

[Curt Sprenger]

Before I screw something up I have some questions. I'm installing the
SMI Silent Partner brake control in the Bronco/Bird. All the Bronco
stuff is installed.

To check out the towed install, the instructions say the gauge should
read about 12" vacuum, no more than 15". Is there a gauge in the control
box? Do I need to install a gauge in the vacuum line?

The instruction also say to adjust the vacuum in 1/4 turn
increments...location of adjustment screw?

Those who have installed one of these units themselves, is there a gauge
inside of the box along with the adjustment screw? Remove the bottom
plate or remove the cover?

--
Curt Sprenger 1987 PT38, Anaheim Hills, Calif.