Both the AMS and Buschur are great. Just use the STM adapter to connect -6 to it. I did not know it was available, so I tapped mine for a 3/8"NPT to -6 union. Works fine but I would of used the STM piece if I knew it was available.

 

old thread but i'm glad i found it.i just decided to pull my hard line and run hose all the way.i wasn't sure if it would be OK,so i went with ate aeroquip startlite race hose which is a little stouter than the push-lock but has a push-lock inner tune/kevlar outer.i feel better after reading the thread.

the hard line ID is just so small and i even found a spot where it went down to .200" just before the rail.