I bought my recharge port from Parts Express http://www.parts-express.com/21mm-panel-mount-dc-jack--090-5012 . I trimmed back the contacts, so that they didn't stick out as much. I removed the split ring washer and threaded the nut all the way down. I took one of the round disk that comes with the transistor set from Romans Empire and opened up the center hole big enough to run a 5/16-32 tap through to create some thread. Drilled out that back hole on the clamp 5/16 dia and pushed the recharge port through from the inside. Threaded on the disk and tighten the nut from the inside of the clamp (not easy) until the port was snug. The kill key was made using one of Roman's transistor top and one of Goth's kill key
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So you threaded the Roman's transistor disk to screw on the recharge port from the top? Was it thick enough?