Sent my beautiful 1.8 3.613 back to Valentine since its now deaf to X and K band. Ka seems to be unaffected. Valentine tested it and confirmed no response to X and it was deaf to the lower half of the K spectrum
Spoke with Mike the Tech at Valentine and he's gonna upgrade it to 3.863.
Valentine offered to fix it for free, which is amazing considering its one of the first 1.8 platforms and probably 7 years old. I decided to upgrade to 3.863 instead for the $85.
Overall, great service.
Now, I get to send the 23/07 Sti back for an upgrade. Here's hoping that their service is just as good... 8)