Usually go out the door with my Evod tanks or Aeromini. But then I also rebuild factory atty's that work like my RDA's. I spend alot of time on the road doing RV trips. I got some dense foam block from the local craft shop. 3" thick x 4 x 4 and cut 4 holes in it to match the Mod dia. I put my short 18350 mods with Kraken tanks in there sitting in the truck console down on the floor hump. (2000 Dodge Dakota SLT)