E01_BASE_Mounting_Plate

Create ONLY E01_BASE as one watertight, editable solid. Use millimeters and exact dimensions. Do not create an assembly or add unspecified features. Main plate: X = 0 to 140. Y = 0 to 140. Z = 0 to 5. Create 16 vertical Ø3.4 mm through-holes at these XY coordinates: (23,43), (47,43), (25,62), (45,62), (25,80), (45,80), (60,59.4), (109,59.4), (65,73), (121,73), (65,131), (121,131), (6,6), (134,6), (6,134), (134,134). At EACH hole, create an underside countersink: Ø6.4 at Z=0, tapering to Ø3.4 at Z=1.8. Keep the top surface flat. Do not countersink the top. Create four rectangular through-slots, each 4 along X × 2.4 along Y, centered at: (17,95), (45,95), (17,117), (45,117). Preserve hole coordinates exactly. Export STEP in these coordinates. Export a separate STL with the flat underside on the print bed, Z minimum=0, 100% scale. Print envelope: 140×140×5 mm.

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