I know very little about these units but having seen this sort of thing on other equipment, I reckon they are locating posts to locate a box cover over the whole unit.

73,
Alf G3WSD

On 02/09/2023 19:07, B. Smith 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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