Quoted from Prodoshi:
nice that you protect the plastic ramp. I noticed more stability of the ramp and less ratteling after installing the protector, but i also used thicker material (2mm), I can't tell if your soft material helps with that too.
My first attempt failed. A flip on the fly usually resulted in a reject from the shield rather than the gate now. I went and studied your shield and studied and studied... and I noticed you did not attach the the top left screw that holds the left ramp protector. You skipped that and attached to the gate above it. This gives more headroom for the shield. I also wondered why is the Ball jumping? And I thought it may be the angle of the ramp is too steep. So I made 2 adjustments.
1) put rubber grommets under my shield at the top to lift it 3mm
2) I lifted the base of the ramp by .8mm by using some of my polycarbonate as a packer. This makes my connection point to the playfield slightly less steep and lessens the bend in the spring steel.
As of 2 games I can report ramp is much easier and I have not had a reject. Early days but I will let you know.
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EDIT: Put on 6 games with lots of multiballs, hitting right ramp now much smoother and no rejects. So packing ramp underneath and adding shield has solved the problem.
Also tape on optos has solved my centre ramp problems so far.