A good few times? Mart, you should know, if it hasn't been done to death on this club, it hasn't been done at all!
I think what I mean is, if there's only been a few owners who've done it and there's only been 2-3 threads about it and yet it remains a worthwhile mod that has stayed out of the mainstream, then maybe it needs to be revisited? Also, you'd hope that from pooling previous knowledge, might spring forth new ideas, a baseline, a group buy, a club article possibly? Maybe this is something that will be forced on the club eventually as Renix units' diaphragms fail?
I don't know exactly what it's about or what's to be had from it from how much outlay but I'm wondering if it's at least worth a revisit, especially at a time when a couple of members (Blunty, Jimmy), are heading this way...