Earlier, I wrote: The pair of 50-pound struts arrived today, and in my opinion they are just barely adequate. If I was trying for perfection, I would use the 60-pound ones, but they currently have a 6 to 7 week lead time. I can easily live with these. In summary, what I have learned about replacement gas struts for the DEC PDP-11/44 in a 40" high cabinet: 1. The specifications are: 15.24" extended, 9.77" compressed, stroke length 5.47", threaded ball studs, extension force 50 or 60 (preferred) pounds. 2. A good replacement is the McMaster-Carr 4138T55 gas strut in either the 50 or 60 pound force version. The price as of January 2022 is $20.29 each. <https://www.mcmaster.com/catalog/127/1377> 3. The threaded ball ends on the 4138T55 are 5/16"-18 threads, while the original DEC ones are 5/16"-24. They are easy to swap without unscrewing them from the cabinet, and this is the method that DEC recommends and describes on pages 5-5 to 5-7 of the PDP-11/44 System User's Guide, EK-11044-UG. You simply unsnap a retaining clip (no tool needed), pop the strut off the ball end (a screwdriver might help), and reverse the process with the new strut. A piece of 4"x4" lumber does a good job of holding the box up while doing this (stick it under the rear of the cabinet when it is in the raised position). EK-11044-UG is available at: <www.bitsavers.org/pdf/dec/pdp11/1144/1144_UsersGuide.pdf>. (In my earlier posting I gave the wrong DEC P/N for the manual.) 4. The 4138T55 struts that McMaster-Carr sells are manufactured by Suspa Parts <https://www.suspaparts.com/>. The 30-pounds struts are their part number C16-24186, and the 50-pound struts are C16-24188. I suspect that the P/N for the 60-pound struts would be C16-24189, but cannot confirm that. Their price is $32.00 each, so it is less expensive to buy them from McMaster. 5. Suspa's design guide recommends mounting the struts with the rod end down, the opposite of how DEC mounted them. I have verified that they can easily be mounted with the rod down as long as you connect the upper (body) end first. That is the way I have them now in my system. I hope that this helps someone who might need to replace the gas struts on their PDP-11/44 system or something similar. It has been an interesting learning experience. Alan Frisbie