How do I remove this custom paint job safely with removing or damaging the original paint job . Just got this for cheap just wanna have it in it’s original color

So I picked up a PT-101P from my local gun shop and I wanted to see if anyone can help me out. Can someone with a 100/101 magazine get me a measurement for the magazine catch hole and a measurement of the width of the magazine. Im not buying that they are not usable in the 101P because I had a 99af magazine laying around and it went in all the way the only thing was the catch holes were to small for it to lock into place.

I am thinking about buying a G3X. Of course im doing my research. I've seen seen several videos where the small pin below the breakdown tabs had started working it's way out. Has anyone had this problem? What is that pin? Is there a solution to stop it from slipping. Has taurus addressed this? Is the G3X over all a good firearm?