[Suggestion] Curve the npeghole primitives

[Max Murtazin]

I totally agree about triangle count but others care about that more than me. 

Also, now that the images are loading, I didn't understand what you meant. That said, if you want to change, you probably have to do it yourself including researching what parts have that shape but don't use the primitive so you can either update to use it or change it so it conforms. If you're up to the task,  you have my encouragement to do this.

I will post tomorrow more informative pictures, as well as primitives, looks like that would be more helpful to the topic