I posted in December after my brand new 617-6 proved defective, out of the box. S&W fixed the cylinder stop and trimmed the forcing cone, returning it to me under warranty, five weeks later. With the harsh weather, I've only gotten it on my range twice since it was repaired. This gem prints about 10--15" high at 15 yards, using Mini Mag and Fiocchi standard velocity 40gr solids! Totally unacceptable. The rear sight is cranked down to its limit. This is totally frustrating. Should I recontact Customer Service and expect another couple of months of delay, or hit the aftermarket for a taller front sight blade (can anyone recommend a good fiber optic?) and replacement it on my own? I hate to dump this lemon on the trade-in market but the temptation is great. Advice?