My friend has two of the military BMW "clones" with sidecars (Chinese I think?). Very cool. Lots of accessories like storage boxes, tools, shovel, gun mount, etc. Not very fast but built solid and easy to work on. Takes awhile to get used to the controls, turning and high speed cornering, but a lot of fun. You may ride it more than your Servicycle. Are you going to mock-up a MG34 machine gun for it? Be easy using sheetmetal and PVC pipe. I made a M2 .50cal. for a 1942 2-1/2ton with ring mount years ago for my brothers collection.