Rather ingenious. The swivel device finally perfected.
A counterweight acts on a slightly upward-and-downward left-right swiveling lever (mostly left and right 30+ degrees, or whatever preferred range).
Usual deal with support vs non-support. The returning motion is the rising motion, so the falling and rising motion is used to deflect the marble inward and outward onto two different track segments, as shown in a similar device the Not-If-But-When 4, a pretty much proven principle through two lengths of the cycle.
I know this device has two-directional motion by a proven principle from the Not-If-But-When 4.
Likely ratios are 1.5X effective ideal mass for the counterweight, right in the middle of the > 1X mass and < 2X mass necessary with 1 X marble abd 2 X long-end leverage (long-end leverage expressed as a ratio of short-end leverage measured to the midpoint of the counterweight).
Assuming deflection is designed properly, this is one of the easiest perpetual motion machines ever to build that I know of.
Consult diagram above if additional information needed.
--Nathan Coppedge 2018/05/04, 1am.
