I just got an 85 combat used but in great shape. The trigger may or may not have had some work done on it. It is real smooth but has alot of pretravel and breaks crisp right at 4 pounds. If I were to send it to the cz custom shop will they get rid of most all the pre travel or will it still be a long pull? Also I want to change my factory front sight to a good fiber optic one. The cz factory only has compete sets which I don't need. Where is/are the best places to get a good replacement, and what are the good brands?