suggested airline fittings when using aluminum hard line

[G-NUT]

Finished installation and for the 1st time, I powered up my Viair compressors and Accuair system. I have each compressor connected to a water trap. From each water trap is the Accuair supplied air line to an SMC bulkhead fitting in the floor. From each bulkhead fitting I have plumbed aluminum hard line to each SMC 90 degree swivel ptc fitting at the EndoVT.

As soon as the comps started filling the tank the bulkhead fitting and 90 degree fittings at the tank immediately began leaking, badly. I didn't get to check anything else out because the tank couldn't fill because of the leak.

The 90 degree fittings and the bulkhead fittings are leaking from the ptc side not at the swivel or threads.

I've installed quite a few air systems since 2002 and years ago I worked in industrial maintenance working on pneumatic equipment, so I am familiar with what I'm doing. BUT I've never used aluminum hard line. So I'm not sure if I did something wrong. When forming my hard line, with a bender, I inserted the aluminum hard line in and out of the connectors several times while trying to get my measurements correct. So I don't know if that is a no-no or not. Don't know if it's a 1-time use only deal or what. Don't know if that did something to the teeth.

Any thoughts?