Had the following done to my G26 by a gunsmith: Replaced serrated trigger with a Glock smooth trigger. Installed Ghost Rocket 3.5 connector with a Wolff 6.0 striker spring, left the trigger spring stock. Took it out to the range today for the first test and on the first shot it failed to return to battery. Released mag and reinserted (no cartridge jammed), used the slide to load a round, fired and again failed to return to battery with no jam. Tried 4 different magazines (each with a different brand of ammo) with the same result. Any idea what might have been done during the above installation to cause this. Before the modifications, had 800 flawless rounds through it. Before any chimes in -- OK, I will listen more to those who say not to do anything to the Glock -- it is perfect out of the box. Just that I developed arthritis in my hands and thought a lighter, smoother pull with no over-travel would help.