The Carnival Vendors here at Beaudy's weekend sales events are touting tire pressure sending devices ( $50 per tire ). These send the info to a dashboard device ($150.00) with lights on it depicting the location of each tire on the coach and the towed vehicle. If pressure drops it will blink at you and give you the location. Has any one of you bought onto this system? It's very expensive smoke and mirrors, but if they work it may be of some value.