When I did my 5lb tanks, I used WineCrafters. Duane is very helpful and you could get it filled on Saturdays (or while you wait). When I got my 20lb tank I took it to Acme Fire & Safety Equipment since I had a larger tank. They did the testing for me and charged me $25 for 25 lbs. They have...
I thought about the different ways to attach my collar to the freeze and I am using industrial velcro (2"). It holds the collar on strong but with some wrestling I can get it off and it looks clean. Hopefully that might work for you
