Playing around a bit, and reevaluating the work that was done, two years ago.
Here’s the Decker hero as I left it, with its different/simplified scanner trench details and different assembly of detailing on the top of the head.
And here’s a theoretical Super Hero, with folding head, opening chip cabinet, and simulated decals from the Spock hero’s scanner trench and (ostensibly) McCoy hero’s top head.
Nowhere near the point to seriously consider it, but installing electronics would be a tricky venture, since there are lights in the half of the head which rotates. Feeding wires into it while juggling the hinge mechanism and some other factors would be difficult.
When it comes to the onscreen props, the Folding Head Hero is seen twice in the film, and is used by Spock and Scotty. It has radically different scanner trench details and head decals compared to what most people know.
The Spock non-folding hero gets the most screentime, followed by the Decker. What is ostensibly the McCoy hero (used when he scans the Ilia-Probe) is apparently the one seen in the prop reference photos (side view, top view, 3/4 top view) that we all know.
The Spock hero’s scanner trench details have solid reference, but the top of the head less so.
The specific details of the Decker prop’s head have been made available to me via private photos which can’t be shared. And, between the Decker hero and the Spock hero, the Decker hero has the nicer-looking scanner trench decal (the one also seen on the phaser), with the white bordering and the sides not abruptly trimmed off, as opposed the Spock hero’s negative space border (or gray border, since the base tricorder color is visible inside that negative space) and trimmed edges.
The McCoy hero has the best reference images, but the scanner trench details can’t be seen in any of them.
Realistically speaking, any version I try to replicate (except maybe the Decker version) would require some degree of guesswork and/or idealization.