I'm very happy with my Huma regulator, I have ZERO creep now. Thanks to those who offered help.
Edit.. Huma has been very responsive and helpful. They have also updated the
Fitting Instructions. Your Impact X serial number must be 183534 or less to use the Huma tuning regulator.
Okay. I've been researching several of these Huma/Impact threads, and still have a little confusion with misconceptions I think I've had.
1) I thought my Impact X had the LATEST "new regulator", as was identified by a serial number being engraved under the trigger guard. I've seen videos and posts where it has been stated that if a serial number is engraved under the trigger guard, that gun has the "new regulator". Apparently there is an even newer regulator, as I have a serial number under the trigger guard, but my gun serial number is 183382, well below the published 183534 serial number after which the Huma Tuning Regulator for the Impact (X) won't work anymore. I am assuming sn 183534 is where they enlarged the regulator housing opening in the action for yet another newer regulator?
2) I thought there were three versions of the Huma Tuning Regulator for the Impact (X)… Low Pressure for 45-95 bar, High Pressure for 80-150 bar, and Extra High Pressure for 145-190 bar. From reviewing the latest fitting instructions and the problem solving other forum members have worked through (thank you all SO MUCH!), I believe there is actually only one regulator, but 6 different washer configurations... 3 for replacing a factory regulator with a 14mm piston, and 3 for replacing a factory regulator with a 16mm piston. So, by buying what is listed as a standard Huma High Pressure Tuning Regulator for the Impact, any of these pressure ranges can be achieved by changing washer configuration? It appears if you buy a specific configuration and don't have enough washers to make the desired configuration, washers from your factory regulator my be used (this is stated in the latest fitting instructions from Huma).
Bottom line... it appears my gun serial number will accept the current Huma Tuning Regulator for the FX Impact (x), and I can buy a unit packaged as the standard High Pressure model (80-150 bar), and adjust the washer config to install it as an Extra High Pressure (145-190 bar) range regulator, because the actual regulator components are the same.
Do I sound like I have it correct? Because I'm ordering a standard HP model of the Huma right now. Thanks!
Added concern: All my logic assumes the washers are all the same spring tension, and the only thing that varies is the quantity used for the different configurations. Are the washers sent with the standard HP kit of a different tension than the ones sent with the Extra High Pressure kit? That could be something I didn't consider.
