scubafanatic
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The older version Atomics had 'defective' 1st-stages, resulting in excessive 1st-stage creep, Atomic later came out with a 'fix' , it's been a few years since I had my B2 upgraded, but it involved replacing the 1st-stage 'piston', which I had done at the same time I took it in for service. There is a fair chance you have an older Atomic that will be needing this 'upgrade', so I'd probably go ahead and budget an extra $ 100 - $ 150 for the upgrade parts, and have them installed at the same time you have the unit serviced....so now you're looking @ about $ 300 total for upgrade kit parts/installation/full service. If you can post photos here of your 1st stage (I need to see the flat end of the 1st-stage) I'll tell you whether or not you need the upgrade kit.
