Not sure when they went to the D screws but I do know my 04 has them.I also don't know when the larger port was introduced from the factory just wondered if you had no change due to the slide already having the larger port.I never thought there would be enough of a gain to justify the trouble so I never even checked mine.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!