Westozzy. That is a really good point. I also have a hose with a broken tab. It still works but if both broke off that would require a valve replacement. Something to consider.
nope! you'd just have to replace that screw on "thingy" for $6-$10, not the entire valve - unless that's what you meant?
So the part with the Nubs (let's call them) which allows you to attach the hose end screws in? So you can unscrew just this part. Or are you talking about the top which screws on after you have finished pumping? There is no issue there.
As far as the boston valve goes, I have never had my ozone nozzle shoot out once I have securely put it in. Pumped collectively 500 odd times on that valve, and you can quadruple that with the other three riders. I'm not sure where this concern comes from, it has never been an issues. The ONLY issue is the fine sand that gets caught in the rubber seal that needs ot be cleared regularly or you don't get a good seal and you have to tighten the valve too much to the point you could damage it.
Must admit I am growing more fond of the new north valves, once you get your head around using them. My brother did have a slight issue with some air escaping even after he turned it back and locked it off (he's the only one so far) so we just blew some air into the valve unit and it worked spot on after that. Thing is even is there is a little air escaping the end cap has a seal which when screwd on, stops all air escaping.