Perfect slide with a little flaw - Grey Ghost Precision Glock 43 Version 2 Stripped Pistol Slide

Intention of buying the slide was usage on my 43x with Sig Romeo Red Dot with Sig Metal Shield cover.Fit and finish on the slide was perfect as the way that I like. My SPG43 slide is Grey.

The problem that I have encountered was when transferring upper slide parts from my 43x, found Extractor Depressor Plunger does not go in all the way inside the plunger hole. Only went in half way and stuck. Called Opticsplanet tech expert and he stated that a little too much paint inside the plunger hole. Opticsplanet exchanged a new slide for me after RMA return process. Guess what, 2nd slide had a same problem.

The solution was
- look for drill bit 3/16" or smaller which will fit perfectly but freely into the plunger hole(prefer a new bit)
- push back and forth slowly with hands(not drill) for about 5 to 7 times(do not use force)
- extractor plunger rod should go through smoothly with no blockage after the process

All parts from 43x upper slide fit perfectly inside new SPG43 slide now and work perfectly with lower parts.

Tips for screw size to secure Romero Zero RDS on top of SPG43 is MonsterBolts - #6-32 x 1/2" Flat Head Socket Cap Screws, ASTM F8356, Alloy Steel, Black Oxide, 10 Pack from Amazon.com with $4.83 which fits perfectly.
Please note that my Romeo Zero has a metal cover from Sig to protect polymer lens. I did try out Holosun 407k RDS on the slide initially but, it is a bit tight to fit in. Maybe a thick paint issue like a plunger hole.

Hope it helps for the individual who would want to go same route as me.