Question: I saw here and there some posts of the ball guides or sides of the ramps scraping through the playfield's clear and print.
I have a LE and noticed the sharp edges are going through the clear probably (no problem as long as it doesn't move).

Should I do anything about it, or leave it as it is? No visible damage anywhere (yet), but the game has very low plays also.

Second question:
When you replace the helicopter, why can't you leave on the blades of the original heli.
Looks lilke the Stern metal heli 'blades' don't do much and they are heavy and ugly, or am I missing something. I took mine out this week to place the heli.

AH well I didn't see any sensor in the assembly drawing:

https://pinside.com/pinball/forum/topic/jurassic-park-stern-2019-owners-club-welcome-to-jurassic-park/page/190#post-6115774

I see only a switch on the side of the wireframe, I thought that was used and the blades are just for show

I’m working on my helicopter and was going to add a light that is connected to the flasher; what voltage are the flashers? 12v?

Thanks for the helpful reply!

I’ve been looking at this helicopter mechanism; how does it work?

The bottom side of the pin has a magnet but I can’t see how that would detect the rotor rotations... Can someone explain?

I was thinking of a hall-sensor, but that would require 2 magnets...

My game stopped working, doesn’t boot or anything, just red lights on the boards.

Anyone has a clue?

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thanks for the help, reinserting the SDcard did it!

I finally took time to add the heli and took
a slightly different approach.
I moved the sleeve for the rod to under the plastic.

Benefit; only a small hole on
the top of the helicopter is required and you gain some space so the heli wheels can stay on!

I tried the heli blades from Mezel but now moved back to the original ones

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No the 2 washers and bearing are there just as in the assembly drawing.

The only thing I had to adapt is the C-clip in the rod, I moved it down 3-4mm.
But you can leave it off also, just don't forget that when you put up the flowsheet it may fall out.

Also, I have these yellow protector plastics which add extra thickness.

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Another question: anyone knows a good spot to get 12V from in the backbox for my speaker lights? I now have a wire running down to next to the coin door, seems a bit pointless to me (was delivered with the light kit).