Took the 35L to Airgas today for a fillup but when I got there only old Joe was working, and freaking out cause he had customers backed up (sick calls I found out later).
So he asked me if I could fill my own dewar... sure says I

To the Brim dude

:
Went to pay up and was told it was on the house... too bad I left the 50L at home
Seriously thinking of selling the 50 - once I commit full fledge I'll put up a FS with pics and description and all