imo, the best way is to pull the bed or just lift up one side of the bed. that way u dont push in the bottom of the tank in, or put the tank on a set of jack stands where the straps should go if u pull the tank. also, put the draw straw in the middle of the tank

 

I got my AirDog 150 yesterday... It comes with the straw and the 90* fitting for it.. However it looks different from the one in the instructions... Musta upgraded, the one included is a nice billet piece rather then mutli fittings!