Every time a drill is spawned, it's retextured to match the heister who placed it.
(Disclaimer: It's actually the heister standing closest to it. As far as I can tell only the host has access to who placed it and I didn't want to make this mod host-reliant).
Every heister in the game has a unique drill texture. Some heisters (Dallas, Joy, and Sangres) have multiple drill textures chosen at random each time they place one. Randomisation should be synced in multiplayer, assuming players all have the same settings.
Wick, Bodhi, Jimmy, Rust, and Sydney use the drill textures from their respective lootbox animations.
Dallas, Wolf, Chains, and Scarface use tweaked versions of their lootbox drills.
Dallas, Hoxton, Houston, Clover, Dragan, Jacket, Bonnie, Sokol, Jiro, Sangres, Duke, Joy, Ethan, and Hila all have new original textures made by me, so no heister is left out, even the two who really, really deserve to be.
The mod is customizable so that new drills can be added to a character's pool of options. Instructions come with the mod.