I have now posted a full description of my just good enough 10 MHz reference based on the Ublox Neo-7M 12-13 USD GPS on my blog:
http://la3za.blogspot.com/2015/10/just-good-enough-10-mhz-reference.html?spref=twIt has photos and schematics and shows how it affects the K3's reference oscillator from initial start-up until it's warm.