I just used an old Mut X V4 clone as a sort of weird ass proof of concept (I have about half a dozen, they're cheap and decent, so I was prepared to sacrifice one in the process, fortunately it didn't break). Each post hole can be used to clamp 2 ends of a strand of wire, for a total of 4 strands, or 8 ends, making an 8-wire twisted coil after all are clamped and drill with RDA attached is twisted.

Mount the 4 post RDA to the drill by the 510 threads. Be prepared to sacrifice it, might ruin the threads.

Loop a strand around something, then take the two ends and screw it in to a negative post. Doesn't matter which side. One length = 2 strands in a post.

Pull the drill back so the first strand is tight, loop 2nd strand around something, take 2 ends, pull it close to drill. Pull drill tight, prop between knees, then loop those 2 ends into the post nearest to the first strand. Screw strand in. Both should be tight and same length.

Repeat for next 2 holes. Work from one end to the other, prop drill in between knees, articulate one knee to tilt drill and keep the strands tight.

Voila, 4 strands = 8 wires! Use drill to spin RDA and twist wires.

Repeat with the other posts. 4 lengths, 8 posts.

As for this being easier than a wood wafer, it's probably not as efficient with many uses (takes a bit of work clamping the wires, then cleaning up), but if someone's just taking a crack at making a few batches in one sitting, and has an old busted up 4 post RDA lying around...