Been addressed several times very early in the thread (an impossible read) and several times after - HW underpowered the 12vdc power supply, and caused numerous problems blamed on a variety of things. This is literally the heartbeat of your game, and cannot be overstated that it won't be reliable until you upgrade. Anything over 30a @12vdc adequate (I'm running 65 as I like headroom, lol).
Meanwell is a trusted supplier of switching ps's, all the way up to medical grade. Several models available. You see them on JJP and / Stern games.
Some 3d printed toys ( and definitely toppers, "amazalites", etc. go for exponentially more money than this needed modification to the machine.
Unbelievable, the amount of flipped games that focused on ripping off LE artwork, crazy mods, things that weren't needed (redundant wise)...claimed they played "perfect" and never did basic maintenance like this. Complete disrespect to the game, and never lost a wink of sleep over it.
Minor rant.....change your ps...money well spent....