I've posted some photos and info on the "Speed-X" key that was used with the BC-474 - the info includes a superb sketch that was drawn by Paul N6FEG of the base and hold down bolt. Thanks to Dave AF5S and Al N3FRQ for several of the photos. Any additional comments or photos and especially corrections would be appreciated. Z http://k4che.com/BC474key/BC474key.htm