So 20 or so years ago when version #1 of the LNL came out I called Hornady and asked if the (ram head) "subplate" could be changed on the projector and the priming system changed to the newer style. They of course said that it wouldn't fit and couldn't be made to fit. I've wondered since then if they were just trying to sell more new presses or if the parts really couldn't be made to work. I saw a couple mentions online that the conversion was possible but there were never any pictures showing a converted Pro-7 or Pro-Jector presses. After getting the latest style LNL and comparing both presses schematics I was convinced enough it was possible to buy the EZ-Ject conversion kit that updates older LNL presses with the wire ejector to the newest style. Measuring the parts the hub area of the LNL subplate that gets pressed into the ram was the same dia and depth as the one on my pro-jector. There are two differences though. The through hole on the Pro-jector subplate is 1/2" where the LNL is 1", and the LNL subplate is secured with bevel headed allen screws where the pro-jector subplate is retained by two roll pins. The diameter issue can be corrected by a simple bushing or by converting over to the LNL drive hub which I'll try. The pins v/s screw retainers can be handled by either drilling the ram and LNL subplate for the pins 90 degrees to the original location or countersinking the roll pin holes in the ram for the machine screws. I first tried using the original drive rod and made a LNL drive hub shaped bushing that was a light press fit to the LNL subplate. I has a 1/2" through hole and it looks like the a standard flanged bushing. It's important that the bushing doesn't stick up higher than the subplate, so the flange on this one keeps the bushing surface .005" lower than the subplate face. I will also try the drive hub set up.
So why fix a worn out press which had exceeded the wear adjustment limits of the design? Believe it or not it's still tighter than the LNL. The LNL uses sloppier tolerances but since the priming system is attached to the subplate a little slop doesn't effect anything. The projector press must be tight and timed better so the priming system on the frame matches up with the hole in the subplate. Taking apart the Pro-Jector I found the source of the timing issues the press was having. I had thought it was a worn index wheel or work pawls, but what was worn was the $2 bronze thrust washer under the index wheel which allowed the index wheel to be pulled further away from the index pawls by the shellplate nut until the indexing was effected and couldn't be compensated for by using the adjustments. The LNL drive hub puts less stress on that bronze washer as the drive rod is no longer used to retain the shellplate. On the LNL the drive rod is just a piece of 1/2" shaft with two pin holes in it and a e-clip and spring washer to keep the drive rod from falling down against the feed pawls. Easy enough to copy. Pics are of the bushing style mod where you keep the Projector drive rod and nut shellplate retainer.