I just installed Chucks tank this weekend and WOW
is it different than the NW tanks!
I just measured and it hangs exactly 6 inches below the bottom of the frame.
The tank is built, well, like a tank ;D ! Seriously, I can't stress to you how much beefier Chucks tank is. You can literally flex a NW tank with an air chuck just trying to blow it out. Trust me, I've done it! I stood on Chucks tank and it didn't even flex!
Aside from the build quality, the mount system is awesome. It utilizes 4 unistruts for adjustability to suit your individual body lift.
Hey, it's cheaper too!!!
My .02
James