I didn't use a press or the milling bit that comes with the kit. I used a small coping saw to cut off the majority of the plastic (rails), then a file. For the center portion (recoil spring channel) I used a dremel with sanding bit. The first time it took me about two hours from start to finish. The 2nd time it took me a little over two hours to finish two frames as I already had my process down. I did use the two drill bits in the kit for the holes.
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