You take the door off the base of the KSR. Slide the rear of the door under the rear lip of the cabinet. The door then lies horizontal, supported by the LESU posts, and makes a repair shelf/tray. I’ve seen the diagram in some manual. 

Nick

p.s. the posts also allow you to flip the LESU upside down to get to the bottom terminal strips. 

On Sat, Sep 2, 2023 at 2:07 PM B. Smith <smithab11@comcast.net> wrote:

The ESU on the Model 28 has four "lifting posts" mounted on each corner - is there another use for the posts?
k4che

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