Quoted from Lermods:
And how exactly would his speaker lights and shaker damage his ramp motor? These are plug and play mods, not like he soldered them on or had to move stuff around. The lights and shaker work I believe. Most likely, he’s got a bad ramp motor or issue on the node board that controls the ramp motor. Since it’s never worked out of the box, it likely was defective from the factory. It happens.
Any time you introduce alligator clips into a game, shit can happen. I have a friend who was baffled as to why his left flipper was sticking up on his walking dead. After about 30 minutes of the basic diagnosing for this problem, I asked if he had installed a mod. He had, some backbox lighting kit. He was shorting something on the board, he removed the mod as per my suggestions, and the flipper issue disappeared.
Mods draw power too. Could cause an issue? Another friend, an op, had a GHostbusters on location that kept resetting during games. Tons of mods, lighting kits, etc. Removed them all and the issue stopped.
I've seen games with tons of mods on them and the underside of the playfield and/or boards are a rats nest of alligator clips and wires. You can pretend that doesn't introduce the possibility of screwing up a perfectly working game but I don't buy it - especially when a large percentage of your mod installers are newbies who really doesn't even understand the basics of how all this stuff works and the dangers of shorts.
I'm not against mods per se even if they are not my cup of tea, I think you folks who are making a living or a healthy side income on this stuff are clever and entrepreneurial. But maybe it's time to start designing these less to be easy to install and a little more "you may need to learn the most basic electronic skills" to install in a cleaner, neater way.