I talked to Kent yesterday and they are available now. Yes they have screw in block plugs now! The prototype was the only one that did not have them. Going to run about $3800.00. You can contact him direct at 585-610-9979. real nice guy!
I Talked to Kent today. He is suppose to call me back next week. I will ask him about suppliers other than Hughes but he did tell me that Hughes is his best dist. I think you can get them direct from him.