AIrlines need to go, Left mine in my 2M Viper for the first year but it all started going south after that. Lines splitting and such. The valve are not that great either, I would use other stuff.. The Tee's never came into play, but I would replace all the airline and tee's with the good stuff. The biggest issue We've seen in all the Skymaster & Extreme is the door hinges .. Very weak and brittle. Have replaced many. Also the arms that the air cylinder piston attaches to on the doors.... I keep DuBro 1/2A conrtol horns on hand to replace those...

Cheers,

Dan