One trick Barry Mulder of Pressureball shows me to help fix the leaky tube is to leave the clamp on the tube as is and deflate it and pour hot boiling water over the clamp area for about a minute on each end. I tried it and it seems to help a little bit but eventually it starts leaking again. But it's not a rapid leak. So if you use it to maintain the pressure of your balls until the next use in a few days, then the slow leak is not too big of a problem. It's mainly a problem when you try to revive flatter balls with it and expect it to not leak too much when you just leave it inflated for a few weeks. You'll need to add more inflation to it within a few days to a week to restore the pressure back to 20psi. Yeah, I notice that buying a bundle of 2 ZT-1 will knock it down to $29.95 for 2, which is not too bad. I've emailed them about further discount if I want to buy 3 bundles but haven't heard back from them. At least the shipping cost seems to be $3 flat no matter how many you order, so they're not trying to rip you off on shipping. The version with the pressure gauge is convenient if you only want one. But if you want multiple of these, it's probably cheaper to buy multiple plain ones (ZT-1) with no pressure gauge and buy your own single detached pressure gauge separately. I'm not keen on the idea of adding a pressure gauge permanently to the device. It would just be another potential point of failure for leak to occur eventually. It'd just be a matter of time. I'd rather have the simple single valve to minimize the point of failure. It'd only take a second to apply an external pressure gauge on it for a pressure readout anyway.