Man this shit burns me up. Bought the mantis weldment from Marco https://www.marcospecialties.com/pinball-parts/04-10015.2 and just spent half my Sunday trying to get my trap door to open. When I finally came across this thread and changed the coil it started to work. Weird that the stainless steel somehow causes the coil to be weaker. Would be nice of Marco mentioned something about it in their item description !@#$%^&. I did get it to work using the 11753 coil but it worked better with a 11630.

Hi Kerry, I just edited some of the frustration out of my post, I apologize but I was all heated up when I posted that. I do appreciate and use many of the Stainless repro pieces you make and think you make great stuff and are an asset to the parts business, I just think in cases like this that whoever sells these has an obligation to disclose these kinds of possible issues. Thanks for explaining...