OK...I think I get it. Once part 3 is assembled, the central portion of the part needs to be cut away so the wheel can be fit into it. Part 3, as we have assembled it, is the equivalent of a solid forging, when must then have the hell milled out of it before it can mate to the rest of the assembly. I agree that part 4 is a serious gilding of the lily, and should be eliminated....the only purpose it would serve is to strengthen what remains of part 3 after making the cutout, and that will be needed only if one trys to make the wheel movable (which I doubt is practical, since the parts fit so closely). One comment, as long as you're redesigning the nose wheel. As currently designed, the attachment to the fuselage is extremely fragile. I propose designing a "socket" into the nose of the fuselage (way back in step 1) and extending the length of part 1 of the nose gear so that the nose wheel assembly can be plugged into the socket and held rigidly in place. The knuckle of the nose wheel assy seems to be strong enough as is. I will post a pic of my current version of the nose gear spitwad as soon as I get it downloaded from my camera (good think I bought plenty of AA bateries).