So let's suppose Q want to have a little fun, and randomly shifts the consciousness of one chief starship engineer into the body of another, from a different era. (So, for example, Scotty gets moved into the body of Trip, but since I'm not really interested in personality-based arguments like "Scotty was smarter than Trip so would have an easier time catching on", I'm just using "Scotty" as a shorthand for 'an average TOS-era starship engineer, and so on'). Suppose that it's made impossible for them to either tell anyone or resign their commission. How well (or badly) would these 'displaced in time' engineers be able to perform their duties, even if only very basic ones? Which combinations would go down relatively well, and which ones would prove disastrous? For example, would "Scotty" be worse off in the ENT-D engine room than "LaForge" would be in the TOS engine room? Or, would "La Forge" have at least a slightly easier time in the TOS engine room than in the NX-01 engine room, since he's removed one century less from that technology?