Does the twisting fix also correct the problem where you can double flip to get hits to the ship during the 2nd Vengeance mode while the ball is still behind the drop target?

I don't have the problem, but I thought the same thing. Twisting the wires can't possibly solve the problem, but I was wondering what people with the problem are seeing.

Which opto wires are twisted together? Is it the lower opto receiver and transmitter are together and the upper's are together also? Or, is it both the left upper and lower opto boards are twisted together and both the right's are together?

I ask because, looking at the pictures it looks like the twisted wires are both coming out of the same hole in the playfield. On my game both the rights come out of the same hole and both the lefts come out of another hole. I would have thought that you would want to twist together the wires from a corresponding opto (i.e. both the bottoms together and both the upper opto wires together).

So, I'm a little confused as to what's the right way. Which way should it be done?

Yes, I was talking about your pictures. So basically what I meant was that you have a hole on both the left and right of the vengeance. The two opto cables on the right side of the ship (for the upper and lower optos) go into the right side hole. And, the two opto cables on the left side of the ship (for the upper and lower optos) go into the left side hole.

So, the way it's shown in your picture, it looks like Stern twisted together the two rights and also twisted together the two lefts. I thought the fix was to twist together the two lower optos and also twist together the two upper optos. It doesn't appear that's how it's done one your game, unless they fed the wires thought the holes differently than on mine. Can you check to see which optos you have twisted together?

Yes, it does thank you. So it does appear that Stern is mixing optos in their twisting. I would think that they would keep the twisting between the sender/receiver optos of the same switch.

@Kneissl: Does it matter which two you twist together?

Ah, now I see where the confusion is.

In your original photo, you are doing what I think makes the most sense and twisting the "speaker wire" to make a "twisted pair"...that's two conductors, so in the end since there are four opto boards in the vengeance, you will have four twisted pairs each with two conductors.

I was looking at Nokoro's picture, and it looks like Stern is twisting the "speaker wire" of two opto boards together to get a twisted pair with four conductors in it. I think Stern, like myself misunderstood the twisting and how it's done.

Now, I get it... You only twist the single "speaker wire" from each individual opto board.

Kneissl, do I have it right?

Maybe someone should tell Stern they are implementing the fix the wrong way.

Yes, that's true, but looking at Nokoro's picture, it looks like they just twisted together both the right opto boards and both the left opto boards--that's not twisting the individual opto boards wires, but twisting them around each other to make a 4 conductor twist. It may work just because of the spiraling that you get in the end, but it just doesn't seem to make sense to do it that way. You get more twists per inch doing it Kneissl's way which will lead to better noise rejection. Plus, it seems more labor intensive to do it the way Stern did it in the picture. Twisting each individual opto's speaker wire by itself would be faster/more cost effective which makes me think that Stern misunderstood the fix.

You might want to undo Stern's version of the fix and redo it by twisting the four individual two-conductor pairs. I think that will help. If you still have a problem, then go with the ferrite.

I'd be interested to see if the problem is caused by Stern's twist implementation.

Nicoga3000, are you implementing the twist like Stern is doing it or doing it the way the original fix was done? The original fix twists the individual two conductor pair and, I believe, is a better fix than what Stern is doing. See my posts above for details.

For those having the problem: Are you guys using the original Stern balls or have you switched them out?
If you've switched them out, what type of balls are you using?