I have used the Kreg R3 Jr. Pocket Hole Jig for a few years and Have been very satisfied with the joints it produced. In addition I have purchased several other Kreg products and have always found them to have superior quality.
Yesterday my new K4 jig arrived from Amazon. While unpacking the jig I noticed the first problem, the weld on the top of the clamp only secured about 1/2 of the length of the joint. From that point I carefully checked the remaining parts. It was then that I found the stop collar was missing the taped hole for the locking set screw.
What is happening at Kreg, have all your inspectors been laid off in some cost cutting program. This recent purchase has caused me to reevaluate my opinion of your company. I can no longer recommend it to my friends. As to others who are considering a purchase of this jig take care. If bought be careful to check the parts for similar quality issues.