kieranu

I think it goes back to the motivation behind the OP and possibly they could have phrased the question better or not, i.e. do they want to know how much gas they can get out of the G unboosted as a couple of people gave a useful response to in terms of a spreadsheet and the formula used as the basis so they can plan the amount of oxygen they need to bring in which case the points Ben and others raise are moot, and/or do they actually plan to decant the oxygen themself in which case they become very relevant. Again, for the points Ben raises a course probably isn't entirely necessary, but at least reading something along the lines of the Oxygen Hacker's Companion in lieu is.

For that matter, I don't see how decompression rates are related to gas blending or decanting per se, particularly in the case of pure oxygen - procedures for gas use while diving in terms of MOD1, MOD2, MOD3, etc yes but gas blending no.