Motor_Arm_NEMA14,dosent fit aluminum 80 tooth gear

[Mark-Zina]

In Motor_Arm_NEMA14 there is a cone shaped area where the bearing resides. I have an aluminum 80 tooth gear that came with my kit.The gear has a shoulder that hits the inside of the cone area. The gear's tooth area is 10mm wide and the shoulder where the set screws are is 16mm dia. and protrudes past the tooth area 6.25mm. Is there a fix that already exist for this? If not is there someone who is pretty good with cad who can make the changes and post a new "Motor_Arm_NEMA14 stl"??