Mockup EnginesThese are our 3d printed mockup motors designed for use with the CT Newman frame jig. No more paper cutouts to work around when you're trying to setup your new frame build. These mockups lock into the engine jig on the frame jig by engaging with the top plate. They also have a bottom insert so they can be used on a frame not in a jig. The top end is removable with the use of pins. Only the physical space of the motor is included, no pushrod tubes,