You might take a look at the GI Joe Mole Pod. Drill is awful large compared to rest of model.
In my large pile of projects started but unlikely to complete, four Moles to be made into a subterranean train: two with drills pointing fore-and-aft, two, sans drills, butted together.
I got as far as disassembling three and shaving down some of the 'fins'...
Shortly after the movie, eBay was flush with 'em, cheap.
Doug