This has nothing to do with whether or not I think the shield bracket is a good product. I've clearly said that it is.
I also never asked for my money back, nor do I want it.
The problem with hand balling the shot starting at the left orbit entrance is that the ball behaves differently when it's coming off of the flipper. The ball has more momentum coming off of the flipper and it doesn't hug the ball guide as cleanly as you show in your video, at least on my game. I believe this is because the ball is bouncing off of the left orbit guide a little and losing momentum near the top above the pops unless you have an absolute perfect shot.
I have spent 8 hours working on this problem over the last two days, including some advice from you over the phone. I can get the same hand balled results as in your video, but not coming off of the flipper. I'm at a 10% success rate, which is up from 0%. I've removed the control gates. I've remove the post lanes. To me it's all about the difficulty of getting the ball to ride that left orbit cleanly, before it gets to the diverter / gate.
Here are some things that I think would be helpful info for others trying to troubleshoot this:
Show a video of you making the shot with the flipper. What's your success rate out of 10 tries?
Show the angle that your spinner is mounted at (both the left and right side) as there is variance here.
Show the way that your right flipper is aligned against the mark in the playfield.
I suspect I have a node board going bad. Could that be impacting flipper strength?
This whole thing reminds me of the original TWD skillshot. You were supposed to hit the tower target but most if not all production games couldn't do that from a plunge, so they removed that aspect of the code.
Barring a hardware fix I wouldn't be surprised if future code took out the concept of full left orbit shots for this game.