Here, the threaded ram opening is clearly visible: the ejection-frame base-plate rests upon the top of the ram; from the left, resting on the base-plate are the brass punch-nut, the threaded ram "adaptor" ( threads into the ram opening); the base-plate is then installed on the upper (7/8Thsx14TPI) threaded portion of the adaptor, and held in place by the Hornady 7/8Ths lock-ring (lower left). The punch (right - in this case, a Niemi 30 caliber piont-up punch) is then set in the adaptor bore and held in place with the brass punch-nut. Punch/die alignment is assured by the over-sized bores of both the nut and the adaptor: the ram/punch are run into the die, and the brass nut is tightened (LIGHTLY) against the neophrene o-ring, which is visible around the punch, at the shoulder of the punch base- the punch is held nicely in place. Hopefully, this helps clarify - if not, I'll try to answer any questions.
The ejector rod is simply 1/2 inch diameter drill rod - on this proto-type conversion, the rod was truned and threaded to match a threaded hole in the base-plate. The rod then is guided by an "oil-Lite" bushing, which is mounted in a bracket, which is held in place by two screws, into existing threaded holes (these holes were intended for mounting powder measurers, ect.) - in all, a very STURDY and simple conversion: no binding and a very positive "feel" during ejection. For the plate and bracket, I used aluminum because I had plenty of it laying about the shop . . . steel may be a better choice; however the aluminum has held up well.
For those interested, the other (large) pic more clearly displays the base-plate mount, the rod-guide, and the rod-guide bracket. The rod guide was made using "Oil-Lite" bushing material. RG