I do not know if Paradigm ever offer any upgrade, but if you decided to do it, IMO it is nothing special to expect that you will be realistic with the prices, specially with your previous customers, otherwise just say no and period, nobody expected nor forced Axiom to offer any upgrade, we just asked them if they would like to offer it...And please do not bring Paradigm here, their performance is not in the same league, and their policies and prices shouldn't be in the same league neither...
Actually Paradigm is a good comparison as the Studio series is very comparable in SQ to Axiom's and as far as I know they have never offered upgrade parts available to the public after new version was released and it has been my experience that their drivers are expensive to buy as well in relation to other suppliers out there.
