I hear you buddy. I am just like you in the fact that once I get one figured out then I don't want to get rid of it or screw with it anymore for fear of messing that up somehow.
I did the same thing to one of my long range rifles. I got it all perfect for me, practiced with it enough to find out all of its quarks and got really really good with it. In fact, it was grouping so well at long range that I didn't even clean it after 600 rounds or so because I feared I might lose that awesome accuracy. So, I came home, gave it a wipe down and put it in the closet. I then bought a few new toys and started the process over and started dialing them in. Shot them until I ran out of ammo. And, since I ran out of ammo on them I decided to take the one mentioned above in storage out to the range this last weekend. What I found was that it was no longer near as accurate despite the fact I hadnt cleaned it or messed with it. More than likely this was me being out of practice with it. That brings me to my next point. If you use them they will wear out and you will have to replace things and work on them. Pistols are a little different than long range rifles but I have a .243 that probably has in the neighborhood of 2700 rounds or so. Most people consider the barrel life on it to be around 3000 which means it will need rebarreled soon if that is that case and then I get to start over.
My point in bringing this up is you either use them and work on them which makes you have to figure out everything all over again once things start needing replaced. Or, you get them right, stick them in the closet and buy a new gun to start over. Or, you get it right and stick it in the closet and not shoot it anymore. I don't know about you but shooting them is the majority of the fun for me. So, while it is gas money, ammo money, etc. and a pain to figure them all out again thats what I enjoy so that is what I am going to do. And just because you think you have it figured out and set it aside from awhile does not mean it will be the same when you need or go back to it.