I have an Apeks DST 1st with an AT20 2nd that I am considering making into a deco bottle regulator. This will be its primary function, and maybe be a vacation regulator for single tank diving. Haven't decided on that yet. I am looking at getting parts kits from DRIS for the regulator, but it does not say O2 clean on the package. I am planning on using between 50% and 80% for deco gas. Will the standard kits work? Do you know if Apeks has another kit specifically for high O2 applications?