[NEWFISHER]

Thank you! After all of my research , that sums up everyones opinions and real-world driving. The vacuum switch seems to be a key component and running a relay on the brake circuit is a better design ( especially on these older floor pedal brakes) and when used together work well. Those with the simple system use thiers , but those who have set up to this or similar systems agree that it works smoother. I will be installing a switch and an led light to lock up in 3rd when towing.