CR-10 Better Bondtech BMG Mount

Better (?) mount for the Bondtech BMG extruder on the Creality CR-10S.

grimling100@'s mount didn't work for me since the screws that came with the extruder are not long enough. Bondtech's own STL file for the CR-10 did not work for me since the extruder stepper motor touched the Z-axis carriage mount bolt.

So, I designed a new mount based on the Bondtech mount (NOT a remix, designed from scratch in OpenSCAD)that has the same 90deg layout of the Bondtech mount and has no clearance issues.