Great post Dave. On your ejector diagram I tune my race guns like the red line so the case is thrown as low as possible insuring it does not hit the scope mount and cause a stove pipe jam. One scenario that your diagram leaves out is the double angled ejector, where the top and bottom are at 10 degree angles creating a flat point some where in the middle. Most of my DW's were tuned like this from the factory with the contact point being 1/3 to 2/3 from the top. The idea here is you get the middle of the road ejection out the center of the port but with the single point of contact you also get the consistency. Here is a pic.
