I was skimming the forums a few days ago and saw a post about someone who found garden hose plugs at home depot that fit perfectly at the end of a blu cart. I can't find it for the life of me.. did anyone else see it? The reason being I refill my own carts with my 510 and I want to do the same for blu..but I can't find out how to keep them from drying out! Thanks in advance.