ddd,
You are getting some good advice here. In particular you should look at videos which talk about tuning the Wildcat and/or the Maverick. They have the same system. It helps to understand some basic relationships between the reg pressure and hammer impact. If you increase the reg pressure it takes more energy for the hammer to open the valve. Once the valve is open you get a shot of higher pressure air, but the valve also will want to close quickly. Unlike the Impact which can adjust the spring tension which assists the valve in closing, the Mav/Wildcat is stuck with a fixed spring rate. So really nothing you can do on that end other than changing reg pressure.
On the other side, when you cock the rifle you fix the from end of the hammer at a set point because the trigger sear is holding it. How much compression (and therefore how much energy the hammer will have when it hits the valve) is adjusted by moving the rear end of the hammer spring (the spring carrier. Adjusting the Internal Hammer Spring out one turn will increase the spring compression by 0.5mm. Adjusting up 1 click on the PW does exactly the same thing (though it is by decreasing the depth of the groove in the Power wheel). So that means the max you can adjust the spring compression only using the power wheel is 3.5mm. All the way tight on the IHS leaves a 2 mm head past the spring carrier. At PW 7 the groove in the PW is flush with the back, so that means you get 2mm of compression. You can screw the IHS out 8mm. So you get way more adjustment from it than the PW. So you really need to adjust both to tune the Wildcat.
I hope this helps. The videos are great for a procedure for tuning, but you should take the PW off (don't lose the ball bearing and spring under it) and pull ut the spring carrier, the spring and hammer weight just to get an idea of what is happening.
Cheers,
Greg