Hi Gif I read your posts regulary and was wondering if you found any performance differences in the location of the plug if cutting the top of the head to lower plug into compression area. Yes it will lower compression but was wondering on effects of the burn in the cylinder. Just thinking out loud as there is a bad storm here and nothing to do. By the way I like your press made one close to it but have 5 spots for contact leaving one stud out for rod location. Thanks Glenn