http://www.soundboard.com/sb/Wild_Coyote_sounds.aspx I couldn't resist. Actually I'm a little more opened minded on this. If the Hayes tanks are working better for you, then by all means use them. I use one on my test stand and it works fine. But I've never had any problem with tanks with brass tubes and a bung. Even the cheapie ones that came with the arf's I've built worked fine. I even re-used a tank from an old discarded ARF that I got rid of because it was so worn out. It happened to be the same tank included in the next arf I made. Hobbico Avistar and the Tower 40 Trainer, and it worked just fine. I did open it up and replace the silicon tubing, and made sure it was clean before reassembly. I also pressure test my tanks before installing to check for leaks. I think its just a matter of getting the assembly correct.

But I think the Hayes tanks are good also.

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