I have the Majestic Kit in mine also. A real improvement.
I also have the magazine disconnect removed, trigger work, and a magazine ejector.
I did not put the Filler in so far.
I need to do a little tuning on the feed lips on all 10 magazines. Mine leaves an empty in the action way too often.
I suspect the bolt contacting the magazine feed lips during ejection jars the empty off the extractor.