About this 3D model

I'm sitting here looking at my printer, thinking "why are there three separate parts there?" Note: pictured model is sized for M6 threaded rods! I've seen a few similar designs but I couldn't find them when I went to look, so I made this one myself from prusa's 'felt' Z motor mount. Unlike prusa's felt mount, this one won't print vertically due to the bar clamp! This eliminates the need for: 4x M3 nylock nuts, 4x M3 washers, 4x M3 screws, 4x M8 washers and 2x M8 nuts; total 20 fewer vitamins. ***UPDATED 9 November*** Replaced with scad that defaults to standard frame rod spacing, and an STL that has M8 holes rather than M6