Summer 2009: Train Horn Added - Siege Engineering "Kong II" Triple Train Horn. All 1/2" airlines & fittings, 5 Gallons tank (with 8 X 1/2" ports). Viair 480c compressor 200psi. Air Zenith 220 PSI Digital Air Gauge added and mounted directly in the ashtray compartment (no modification needed, fit just perfectly). And as you can see, it's closing normally and without any rubbing.