Joe and one of the other employees (DesignGuy) spend time at bullpupforum.com because of the ZK-22 stock. This is from DesignGuy's post on 2/6/2013
"The TV crew is back filming the next season. They tend to slow everything down a bit, especially since Kris and Steph have been helping with the ZK-22's assembly. They still work in between filming. "