Sunnytech Hot Air Stirling Engine Master of Science

Got this Sunnytech Stirling Engine kit, still in the box. It's one of those external combustion motor models that's pretty cool to watch run. Good for a desk toy or if you're into science stuff and want to see how these engines actually work. Box says it's the Master of Science edition. Never really got around to setting it up so it's just been sitting on the shelf.