Okay....so lets see....I have a U Can Do 3D 46. It has a cowl and the engine is mounted upside down. Thus, giving a not to great
area for glow plug changing etc. And the fuel tank has 3 holes in the cap, 1 for breather (to the muffler), one for the actual fuel line to
the needle valve. The last one being for re-fueling. If one were to use all three of these in this particular model, you could run a re-fueling
line to the cowl, drill a hole and cap the dang thing with this fuel dot. Would that be a correct usage of fuel dots?

Dave...