Here’s what you do. When you get the gun, pull the barrel and rotate it to the slug port if it has two ports. Install the barrel. Single feed a pellet and pull the barrel again to make sure the probe seated it into the liner. If all those things check out, fire a couple shots to get things seated. Adjust your first reg to 175-180b and never think about that reg again. Set your second reg at 140b and work your micro up to find your max velocity while your wheel is on 16. Do all of this with your valve knob backed out past the last line. Whatever speed it shoots when you find the max speed with the micro, subtract 4% from that number. If that number is fast enough for you, now it’s time to start tuning. If it’s not fast enough, turn your second reg up to 145b and click the micro up until you hit your new max speed. Do some math again. When you finally get a math number that’s good enough for you, click the hammer wheel down to 13. You will see a lower velocity and notice the gun sounding a little better. Then use the valve knob to knock another 10fps off that speed. Now you’re probably at -3% of your max velocity and it’s time to start shooting groups. You can use the valve knob to further reduce the velocity another 10fps while shooting groups or you can even try going to 12 on the wheel. Don’t waste your money on bolt on crap like pin probes and limp springs. If you want a solid gun, use what came with it. If it won’t give you what you think you need, then what you think you need is wrong.