Picked up a new 4" Wilson Professional a couple of months ago and have been busy learning to shoot it. The gun ran perfectly from day 1 but being an older guy I had difficulty handling the gun with really strong recoil spring. I switched from the original spring to an 18# spring and find the slide easier to retract for loading/locking back. Other than that, there isn't much to say about the gun except that it has been Load, Aim, Fire, repeat, repeat, repeat, ..... One interesting note is that the 4" gun seems to be about as accurate as the 5" guns but is more sensitive to trigger control. REALLY have to be careful to avoid pulling shots off group. Had a good day at the range today. Group shown below is first five shots at 18 yds, standing, two hands, no rest, with handloads. Group measures 0.908" center to center. What do you think, should I keep the gun or send it back for a tune-up?