Quoted from mof:
Just watched 5 minutes, and noticed nothing. Need help here.
* what is the problem that the mod solves?
* what is the mod?
* when in the video (timestamp) is the mod working?
No worries.... I guess it isn't obvious for anyone not familiar with Seawitch.
It is just the loop/shooter diverter.
Original is a thin shim flap. This is very "bouncy" and messes up orbits in both directions. Spinner shots would usually rattle against the exposed wood rail and dribble straight back down and stop the spinner run. Orbits going left to right the ball would deflect from the metal flap and spring the ball out making it hard to reach/hit as it passes down across the upper right flipper, but some distance away from the flippers face.
The mod is a Rigid diverter, allowing the loops to flow smoothly in both directions. I also moved a post on the Left side about 3/16" (not too far so that the original plastic is still utilised without modification), which makes orbits "achievable" from the upper and lower right flippers. Any spinner shot now very rarely rattles to fall straight back down and prematurely stop the spinner, instead now the loop runs all the way around and the spinner has a chance to "spin out".
The mod is operating frequently throughout all 5 videos. Any time there is a launch, or any orbit in either direction. Anyone familiar with typical factory Seawitch flow would likely notice the difference in game flow in these videos. Frequent loops, loop combos, not generally a feature of gameplay for this old Stern layout!
A couple of points...
0:56 in first vid is a loop combo.
3:20 in the second vid is one of the spinner shots.
Similar to some of the flow improvment for Beatles gameplay, but much more subtle and bolts on.