Sawadee Krup Everybody,
I apologize for not being able to type in Thai krup.

I have a Colt Gold Cup National Match (Series 80) that I would like to modify. My question is:
would modification affect the value/price of the gun? And if I don't want to affect the value of this gun, what parts below should I
not install?
Thanks for your help krup. I truly appreciate it.
Nawin

Items that I plan to install:
1. Ed Brown memory groove beavertail grip safety
2. Ed Brown tactical extended safety
3. Ed Brown drop-in-maxi-well
4. Ed Brown drop-in bushing
5. Ed Brown two-piece guide rod assembly
6. Ed Brown standard magazine release with oversize button
7. Ed Brown hex head grip screw
8. Kings checkered slide stop
9. STI match trigger (black polymer)
10. Millet tritium front and rear sights for Colt Gold Cup
11. Wilson checkered frontstrap (wrap around)
11. Crimson Trace laser grip