Rush Side Loop Switch Fix
As others have noted, the switch on the Side Loop (the shot between the Side Ramp and the Dead End Shot), has trouble registering strongly hit balls. I would estimate that less than 50% of my shots were being registered. This is not unique to my machine - I've seen it happen on just about every Rush I've seen on stream, and also on the Pro I've played on location. The problem is that fast balls will get some air going around that sharp turn, and won't fully depress the switch mechanism. You can try bending up the wire loop but you will risk bending it too far, and balls can get stuck when rolling down in the other direction.
This is not unique to Rush - I remember there was tight U turn shot on Rick and Morty that exhibited the exact same problem. The solution there was the exact same one here - swap out the physical switch with an MRS switch from Sonic
I contacted Matt last week and sent him some pictures - he had a switch mailed to me within a few days and I just installed it this morning. I took some pics while I was installing so thought I'd make a quick guide.
Here is the problem switch from both topside and bottom:
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Here is what I got from Matt. The switch is very nicely made and fits perfectly in the slot.
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This is the original switch after removing the two hex screws fastening it to the playfield. The MRS has a nice length of tinned wire attached to it, so I just snipped off the two wires from the old switch.
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I then stripped the insulation of those wires about an inch, twisted the wires together, and soldered them. I used heat shrink tubing to prevent any shorts. Here is the final installed product:
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Lastly, this is what it looks like from above. The switch sits just below playfield level.
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I fired up the machine and played a test game and the switch worked perfectly. I didn't notice a single instance where it failed to trigger. I was just messing around at first just focusing on that one loop, but then got in the groove on ball 3 and ended up setting a new GC. Of course it was because of the switch.... LOL
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