No, I don't sell any hobby supplies, just a modeler/hobbiest. See my reply to Al, I have no issue with hard/clunk tanks. Dirtybird, have you even taken a few minutes of your time to look at the sites I posted & seen what I am describing, or are you basing your opinions on dated technology? Your resistance to even research an idea is what confuses & amazes me about all hobbies. If it's not the way that is commonly accepted, it must be crap. Fuel bag systems are absolutely not for everyone, or every model - never even implied that. Open your mind, explore outside your normal procedures, you might actually learn something - whether you agree or use it is not the point - learning is!! My purpose is not to hold a gun to anyone's head to force an idea upon them, but to offer info that may be beneficial to the ones that want to learn. The others can stay stuck with "that's the way I was taught". Key words are taught & learn, just because you learned something doesn't mean you HAVE to agree or actually try it. I'm 64 years old & yes, this old dog can learn new tricks - but not if I'm not WILLING to learn............It doesn't cost a penny to learn, just time. A closed mind is a closed door, through which nothing can pass. And that is both a waste & a shame, IMHO. Last post on this subject, as you obviously REFUSE to even crack the door to your mind open, if only just a little. If one refuses to learn, one can never progress. To teach, you must also be willing to learn!