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297
The 4 x Aluminium-Spacers-40mm’s should be 50mm long, instead of only 40mm. Later on (4. X-Gantry Assembly, step 3), to insert the bearing, an 8mm-Shim and the 8mm Lock collar, the flexible coupler is pushed so far into the motor shaft, that the flexible part is completely over the motor shaft. The lead screw already has enough length to accommodate these extra 10mm, so I leave this suggestion for an improvement.