Stop right there !!!!You are right where you want to be. Don't over think the gun. Yes you can smooth the trigger out a bit more but I wouldn't do anything else as far as tinkering or power modding. Try some different pellets like the Winchester Domes found at Tractor Supply. If it don't meet your needs as it is now... go get something else. It's a $40 big box store gun and you have it shooting very well right now with your personal limits. Enjoy what you got and consider doing the exact things to the M/M one standing in the corner... no more and no less. Seen so many people blow these things out of the water trying this and trying that. At the end of the day they become frustrated and throw it in the trash.... after becoming quite annoying to people around them ... lol
LOL.... I would think you would have tried it by now.