Ken's not a big fan of eMail. Best time to try and call seems to be between 10-12 Eastern time. Ken does keep odd hours, and he's in and out of the shop frequently working on stuff so he's not the easiest to get on the phone, but he does know tons and is always willing to help out once you get him. There was a personal matter a few months ago, but they seem to be back up and running just fine now.