Originally posted by nomadkng part of the issue is probably beyond Precision's control.
While I have not had good experience with Precision I agree in this particular case there really is not an issue. Yet. I fully realize the same people who argued that I should file BBB complaints and hire a lawyer when I discussed my lens issue with Precision will not agree with that. But IMHO, 10 days really is not very long. Precision has extremely poor communication skills and they continue to demonstrate that one hand has no idea what the other is doing. I suspect the "5-7 business days" is standard stock reply and should be ignored. It will take as long as it takes and they should not quote time frames when they really have no idea.
Sending the lens to Japan for repair is a slightly different issue. My feeling is that it is far better to send it to Japan and have someone who actually knows what they are doing look at it. But again, not everyone will agree. Many posts the last time insisting that I should get a new lens for free or instead hire lawyers because the lens went to Japan. Not going to argue as that is pointless. Again, it will take as long as it will take and if Precision has neither the skill or the equipment to repair something then I would rather it go where it can be repaired.
The DFA 24-70 is new and likely they have not seen much in repair work yet. Or perhaps if these are indeed made by Tamron then maybe Pentax wants to see it first hand to follow up on the issue. Who knows.
To the OP, if in a few weeks you have not heard anything PM me and I'll send you an email address that worked for me. Nothing can speed up the process but I did get confirmation on where my lens was at and what was happening, perhaps they can do the same for you.