Quoted from pumba:
I havent had a chance yet to check my guides yet as rd suggested but I did contact spooky & was told to tape it but it didnt last long, heat shrink would be better but would need to cut the wires then resolder in a tight spot & get heat in there for the shrinks, not something I would take on myself. Contacted another person who sort of specialises in this sort of thing, he told me he had heard of this & recommended to try raising the upf & to look at installing "oil boards"? same as used in twighlight zone. Do you think the ball contacts the switch by just rolling through the tunnel or is something launching the ball up into it? Looking back through these posts it has been mentioned twice but couldnt find any follow up posts on how they dealt with it.
pumba - Here is my fix sans the heat shrink - I forgot to take a photo once i got it done. So I took a post like the one in the photo and cut it with my table saw to be same height as the switch (with the top of the screw factored in) drilled a small start-hole right in front of switch, put the rubber on and screwed it down. Then I took some adhesive putty and put a decent sized ball on the middle contact just as a back-up to the homemade switch guard. I did this because I was out of heat shrink and i had these supplies.