Hey Timplett,
a thread that initiated that the other day here is this one:
Lets talk about ARCs and Circles (buildbotics controller)
But in the end, every arc or circle is converted to x,y coordinates by the CNC controller, a CNC works this way. Question is which algorithm it uses, not only to convert it into x,y positions, but also how fast and how fluid the movement is computed. I would not buy a CNC controller without having checked how well it performs the g-code instructions, not only mechanically but also mathematically. How does the Masso controller do it?