Heng Long 140mm turret ring

This is a 140mm turret ring for RC 1/16 scale tanks from Heng Long and Taigen.
It belongs to you to add the screw holes and make the center hole, because it may differe from a model to another.
But here you have the basic shape for the screws. Please tell me if you have any issues with it, but it works on my side.

I also give you the sketchup file to modify the model (if you use it) and the STL.