The Voron Switchwire is based around the classic Mendel (aka bed slinger) design but modified to be a CoreXZ so the print head is belt driven in both the x and z axis. With this modification they have eliminated the leadscrews that cause much of the problems found with these Mendel style printers.
This also allows for very fast z movement speeds and less weight on the gantry by moving the X motor to the frame. The stiff 3030/3060 frame is just large enough to cover the entire swing of the Prusa 250×210 bed and allows for a natural enclosure with no additional modifications required.
LDO provides a kit and essential components, such as frames, linear rails and motors.