Nah Sal ... that stuff is add-on stuff and perfectly fine. Like changing the sights or grips ... no issue ... in my opinion at least.
By the way ... for range work ... do whatever the hell you want ... change out the springs for clothes hangers for all I care. I say go for it.
It's for carry that I don't think that serious change-out stuff should be done, and I think most SR's are used for carry by people here.
Every one of my guns is stock ... EXCEPT for my Springfield 1911 GI ... it's had some drop-in stuff done and a scary excellent trigger job ....DEFINITELY range only .... I won't even let anybody else at the range touch it unless I know they're an experienced shooter and well-versed in 1911's.
Truth be told ... the rest of my guns are higher end Colt 1911's and Ruger and Colt revolvers. Never felt a need to do ANYTHING to them, but most of the Colts are Pythons and Gold Cups, so they don't need any work anyway. I have all three calibers in Super Redhawks, and a GP100, and they all have perfectly acceptable triggers. A few MKII's which are fine the way they are. Honestly ... none of my guns have ever needed any work. I bought a well-used Colt Python once that had slight timing issues when I bought it ... I sent it to Colt and it was repaired PERFECTLY for $85.
Buy good guns, test them first, and don't buy a gun knowing it needs work or doesn't meet your needs, and your amateur gunsmithing days are a thing of the past.
If you flat out just like to tinker .... tinker with your range guns ...
By the way .... guns like the one that the OP is talking about (with all that amateur stuff done to it) is the reason many FFL's will
ONLY accept transfers from other FFL's. WHY ???
Liability. If an FFL accepts a transfer of a gun from another FFL ... and there is a problem or an issue with the gun and somebody gets hurt ... he KNOWS that he can go back against that FFL (who transferred it to him) .... who he
KNOWS has deep liability insurance. Accepting a transfer from Joe Citizen who has nothing but a 1987 Chevy to his name is a liability to the receiving FFL if it turns out that the gun in question has been hacked up and messed with by some amateur kitchen-table gunsmith.
There's a lot to think about when modifying the fire-control system of a gun ... including disclosing all that stuff to a potential buyer. If anything bad happens ... you WILL be sued. Sure you can say you don't know anything about it, but that would be fairly easy to disprove .... especially if you posted it on the internet in a gun forum.
The internet is FOREVER, and lawyers just LOVE to let their junior partners search for stuff like that, as well as interview all your friends and acquaintences that KNEW you did that stuff to your gun. The question is ...will your buddies commit perjury for you ?
REV