BIQU H2 Ender 3 +Pro Mounting Bracket for BL Touch

Update: Modified the original model to the “thin” model to bring the print head 6 mm to the right to keep on the build surface from X=0. This aligns with the stock nozzle position on the Ender and also allows for clearance to the bolts on the back of the plate into the Biqu H2. I moved the BL Touch the same amount to keep the same offset below. Additionally, I reduced the thickness 3.3mm to only just clear the bosses that hold the stock Ender heatbreak. 

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Slight modification to change the source step file to the bolt pattern for the x-carriage on the Ender 3 (validated on Creality model) and Ender 3 Pro.  Used as many bolts as possible to add stiffness. Using the same 7mm thickness from the BIQU mount which unfortunately limits build volume by 6 mm.  I reused my z-axis limit switch on the right hand side of the 4040 section (Ender 3 Pro) and would up with a 214 mm Y-axis build length.  I might try to update and reclaim those 6 millimeters.

Printed in FlashForge ABS Pro Grey with 0.4 mm nozzle and 0.2 mm layer height.  I upped the perimeters to 4 and upped a gyroid infill to 50% for more stiffness.

BL Touch offset (z offset is approximate)

 *     +-- BACK ---+
 *     |    [+]    |
 *   L |        1  | R <-- Example "1" (right+,  back+)
 *   E |  2        | I <-- Example "2" ( left-,  back+)
 *   F |[-]  N  [+]| G <-- Nozzle
 *   T |       3   | H <-- Example "3" (right+, front-)
 *     | 4         | T <-- Example "4" ( left-, front-)
 *     |    [-]    |
 *     O-- FRONT --+
 */
#define NOZZLE_TO_PROBE_OFFSET { -38, .2, -.64 }