I agree with Thomas. If you are doing a full custom build it should not have to be tweaked. Either you know how to do a custom trigger job or you don’t.
I have the Gray Guns Trigger kit in one of my guns but am still using the OEM Sig trigger. Any benefit or reason to swap it out with the GG Trigger? If performance will be indentical I’ll just leave it alone.
The carry optics back up is a good idea if you mainly shoot open. My open guns are out of commission so I’ve been shooting my X5 and it’s been helpful. It wouldn’t kill me at a match to have to switch to it.