BIGDOG & WildBill,
Yes Sirs, I have thought of an "exhaust outlet". In the FD, we had "traveling" exhaust accordion tubes that clamped onto the tip of the exhaust of the fire truck. That way, when you started the rig, everyone jumped on and, you headed out the barn, the tubing would just "self-disconnect" from the exhaust due to the fact that the magnetic connection was not strong enough to damage itself and or, the tubing.
But, I've looked into portable exhaust extraction units and, some are, well, "Kind-a" in reason, in terms of price. But, I've also thought of just cutting a hole in the outside wall and run the tubing through it. But there's a couple of problems associated with that. One, the exhaust pipe, is on the passenger side rear corner and, the outside wall of the RV garage is on the drivers side.
So, what that means is, I'd be tripping over that thing every minute I'm in there tinkering around as, the portion of the RV garage right behind the coach is my PROJECT area where, I do about 99.9% of my tinkering, projects, jobs etc.
So, as stated, I will at some time try and do a diligent search for this leak. But, not at the time. So, by adding that little auxiliary air fill line. It will enable me to keep the coach's air system up much more efficiently which, will allow me to almost instantaneously pull it out, within 15-20 seconds or so after start up.
At that point, I can close the RV garage door and let it run 'till full air is built and or, just simply take off for a cruise of the Lake Havasu area so it warms the beast up proficiently. I do thank you two for thinking of a remedy for this situation. Much appreciated.
Scott