The crown can be done after all is said and done but shipping back and forth if it becomes time sensitive will not work. I will probably have to order a second set @ 4.100" with all of the features I need. Yes horizontal gas porting will be utilized as well as a 1mm/1mm/2mm ring pack. For the same reasons I just stated above the chambers and valves will not be coated. I'm trying to keep everything as in house as possible. I am intrigued by coatings as well. J.Rob
