Those are terrific numbers, Bob! Can't wait to see the .25 comparison.

I plan on using the Disco spring as well, but can you tell me what differences (pros/cons) there are between the Disco vs 22xx hammer, if any? - i.e. weight, length, etc. Never had a Disco before, so I'm pretty much blind in that area.

Is the bottle rigid enough (when attached to tank block, under pressure) to keep it from "clinking" against tube, or would it need some kind of band to support rear of bottle?

Sorry for the questions, just wondering is all...

Todd