Scaffolding would be a better term. Even in a microgravity position when dealing with bulky, massive, and damage-sensitive components in precision locations free-handing a shift in position might not be best practice. When inertia is a pain, it strikes at least 4 times.
Yay! Annual always seemed too frequent for the level of invasiveness.
Deepnight Revelation might still have both of these modifications, but it’s expected to be operating alone for decades in unknown circumstances. The increased SU requirement seems a nice reflection of the non-standard maintenance situation. A bit abstract by necessity, but I would not be surprised if it appeared on other very long-range designs. The other modification needs a relabel; it’s not self-maintenance, it’s self-overhaul. It only gets pulled out for these crazy “let’s skinny-jump off the known map for a decade or more” projects.