I have every one of the controllers ... RX28, RX211, RXV21 and PDP8A, 8E, 11/23, 11/73 and 11/34 systems to run them on, although none of them has been turned on or used for several years now. I once had a BA11VA (shoebox 11 chassis) with an 11/73 system that fit in just 4 slots ... I would...