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M3 regulator adapter to MK1 and MK2

Has anyone thought about making an adapter to screw into the MK1/2 action so we can use the M3 bottle/regulator assemble. I’m not a machinist but seem to be something that can be fabricated. I’m not worry about the remaining bottle pressure gauge because the first regulator is set higher than the second. I can always use my inline fill tank gauge to monitor the pressure while refilling too. I’m also wondering if the M3 action has adding air passage.