My advice is to seek out a place that does it as a business and not as a "Oh I've done that before" place.
Well a RV shop may be good at roof vents but I'd seek out a place that installs Espar for a living.
Brian who installs Espar systems for Espar of Michigan does the best installs of anyone I know of, he does quality installs of everything you mentioned and I'd recommend him to the highest degree.
Turtle has been known of using this shop.
Give Brian a call at 734-735-6971
I think (if they'd sign you on) with a flatbed straight truck you could stay pretty busy with Landstar by picking loads off their load boards....not sure but I see a ton of good paying loads that would fit on my 22 footer if it was a flatbed.
you'd have to sign on with Express because Ranger...
I'm also thinking of getting one....the one I'm considering mounts on the windshield and also has a
wired remote camera that can be placed just about anywhere in the cab....I'm thinking of placing the remote camera to the lower corner of the windshield in front of the drivers seat....I think...
tknight you hit the head right on the nail......went ahead and replaced the whole unit...with almost a million miles I decided to replace it...I hear the O-rings inside also tend to fail over a long period of time...thanks for the come-back!
I tried the dish liquid method over and over but the fan hub isn't that easy to check that way because everything is hidden from view and I can't hear air escaping either...the air loss will also happen when the ignition is turned on without the engine running and this only happens on the #2 air...
Well when my truck went down due to Algae, Water and Debris it only had around 5k on it and before I started running it I pulled the drain plugs on both tanks and drained about 2 gallons from both tanks to remove any H2o that built up from condensation while sitting in storage.
If the truck that fueled just before you, did it when the tanker was filling the tanks...you could get a real bad mixture of algae, water and debris delivered to your tanks just by what was remaining in the lines to the pump you're using.
It happened to me after fueling at the Flying J in Fargo...