To begin, thanks in advance for your help and observations. Background: I bought a G-34 for range & self defense, soon to be followed by a G-26 (carry). I truly love these two pistols. I've left the G-34 as is except for a light polish on the trigger, etc. I added only a captive SS guide rod with the stock spring. I now envision this pistol for the range, maybe some IDPA to improve and maintain my defensive skills. The G-26: 3.5 lb Glock connector, NY#1 spring, with a Glock's extended slide release and extended mag release. And Wolff hardened steel, non-captured guide rods/tubes, again using stock springs. My main concerns are my use of the steel guide rod(s) in these pistols. My goal was strength, smoothness and reliability first, and improved accuracy & reduced muzzle flip second. I do know that the plastic rods have been known to wear, chip and break. First question: will the steel rods serve these goals? Are there any negatives to using them? Next, I have read two interesting claims: first, that the stock plastic guide rods are designed to flex, and it is claimed that this flex serves to promote harmonic balance. It was claimed that a steel rod has the opposite effect, ie to cause harmonic imbalance and perhaps damage the slide in some way, say pounding for example. Second, I also saw one report that the hole in the stock plastic rod is purposeful, and somehow acts as a cool air pump! If true, I'm not clear what effect a steel rod would have. My own sense is that these two rare claims have little validity, except for the fact that both were made by seemingly competent resources (Remtek and Robar guns). So in sum: 1. Will the steel guide rods add reliability and strength? 2. Will they aid accuracy? 3. Will they reduce muzzle flip? 4. Are there any reasons to avoid steel, eg damage to the gun? 5. Are the claims re the stock plastic rods adding flex and harmonic balance, or cooling air valid? Again, my sincere thanks. These matters are of concern to many ordinary shooters. BTW, I really don't want to hear that the Glock is perfect and reliable, don't mess with it - as much as I believe the Glock is a fantastic design, it certainly can be upgraded with care.