I'm actually pretty happy to hear it's going back to Japan and getting a factory repair. It was amazingly soft right of center, and just progressively worse the further to the right. I don't know if this was a manufacturing defect of elements not aligned properly before being glued, or some other manufacturing flaw, but my gut says the lens should have been rejected by the original owner. I guess my eyes must be better/I'm more demanding of my images. I know this lens has a reputation of being soft, but the lack of consistency across the frame belies a bigger problem. Now what I'll find is the left side, which was pretty sharp, will end up getting soft with the changes needed to correct the right side....
So, I got a phone call on a warranty repair saying the lens was going to Japan for repair, but it took a phone call to find that out just sending an out of warranty repair in. Warranty repair VIP service due to an agreement with Pentax? It would be interesting to know, but I can say the warranty repair experience was good. I'm still OK with this repair, it just took a little more effort on my end, but not unreasonable, and I got through to a helpful person who was able to look up the status quickly. What would have been nice would be an email update that they were doing this and to expect a longer turn around time.
Not that it's really a gripping story here, but stay tuned for updates