Okay, I did as everyone recommended and the gearbox arrived the other day. However, I have a question about it. The output and input shafts have some play at the extreme turning positions however when the shaft is “on center” there is no play... Does this mean that I have a defective part? When there is play, it is very slight... The reason I ask is that I thought that the adjustment screw adjusts across the whole range... Someone please reassure me!