Thanks! I have the 3 dual width extenders already next to the machine! The idea crossed my mind :-) , but is was not board swapping ... I thought of swapping the whole RK611 backplane and modules, because the hauled machine was in working condition decommisioned. The RK611 that I have installed is completely unknown. I had the RK611 backplane already a few years, and I got the 5 modules just last year, not known-good, but neither "known-bad". There is not much learning experience in any swap approach, be it a module or a complete system unit, so I downloaded the RK611 print set ... - thanks again, Al. A more complete description: it is an 11/34 with RX01, RK05/f, RK05/j, Laboratory Peripheral System, Kennedy 9100 (vertical) tape drive, expansion BA11 box and one RK07. We did lock the RK05 heads before moving of course. (We = Edward and I). There is also a "BA11 expansion box sided" box from Plessey, but I have not yet looked at the details of the machine, so that Plessey box is a black box to me at this point. - Henk. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.