I use an Omega trail charger , fill only guns and i have only tube guns , three years and going strong. No tanks
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Same here, but 2-45’s and 1-60 minute, and cascade the same way.Alkin W31 Vertical compressor and have 3 60min/98cf tanks. Cascade fill with two of them and rotate out the lower pressure of the two for my third that's always topped off and ready when it's time to refill the lowest tank. I NEVER have to wait on air that way. It's bliss.
Where/who did you buy it from?
https://nuvair.com/mch6-compact.htmlGX CS3-I.
A tad noisy, but It works well.