Valve spring question and face valve question (pics)

I want to use the Boss valve pictured below as it has a much “softer” spring (the longer one) as oppossed to the Disco valve (the shorter one) which is much stiffer.

I tried the stiffer one with the disco valve but I was not happy with its performance…I am looking to keep the valve open a little longer to allow more air for more energy…

“Ideally” speaking, I would like to cut some threads off of the disco valve face and do some flow mods…and the reason I would want to do this is to take advantage of the “double o ring seal” that is on the disco valve face…but I figured I’d ask the “powers that be” if the Boss (I think it is a boss…)valve face only has the one o ring…but if this is sufficient for a pcp set up then I will just use the single o ring face…what do you think?

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