For those who like to have a drum appropriate to their favorite faction, these are alternative skins. There is also variety to the cords and tighteners on some drums. Some contain emblems for the Nation.
A single mod pack for all the illustrated drums above is the enclosed compressed file: Pick the one you want (the file name indicates which drum it is). The Duffer version is illustrated in second screenshot.
Mod is in patch format - just place in your data folder and play.