This guy is getting back to the basics of adding memory to his computer... http://kontraptionist.tumblr.com/post/50707244948/core-memory-panel-progress-we-successfully
Hey... That stuff was great! Always worked for starters and you didn't have to worry about ESD. The stuff we used had super tiny cores. The ones in that pic look huge. Seemed high tech compared to those dual triode flip-flops I built. ...Tiger