Went Friday and had TruGlo sights installed on my G30SF and G21SF during Glock Day at the gun shop near me. Took it to my range today and found that the G21 shoots about 2" left of POA and the G30 shoots about 1" left of POA - each at 15 yards. The sights were installed with red thread locker on the front sight screw and also the locking set screw on the rear sight. The shop owner said that he will make adjustments as required, so I may give him one try, but he is about an hour drive away - not very convenient. I have ordered some nylon drifts from Brownell to adjust the rear sight if needed later. My questions: 1. Will I have to heat the rear sight to release the red thread locker on the set screw? 2. Will the heat damage the Tritium inserts? 3. Will I need to reapply the thread sealer once the set screw is broken free and retightened? I really like the sights vs the stock sights. I like the taller front blade and more light on each side of the front sight. Thanks if advance of any guidance.