Yep, its been quite a while and I have since mounted the horns in a different location; Sold my 5th wheeler and bought a Bigfoot camper. With the camper, I have to remove my toolbox, so I would loose the whole horn installation. I can't live without these horns in RV-mode, anymore. So, I moved the compressor and expansion tank to the right front side of the truck bed, drilled a hole for the high pressure line and mounted the horns on the frame, right under it. Horns are getting dirty now but facing forward, they seem to sound even louder. Everyone I talk to, who hears them, wants them too! 

Have a nice day! 

Henry