Quoted from Ollulanus:Just did a playfield swap on my seawitch, upgraded the controlled stuff to yopps. Getting ghosting on a bunch of them - any thoughts why? Quick search came up blank, figure it's something simple so thought I'd ask here before spending a bunch of time on it. Got several other small things to fix post swap in the meantime anyways....
I had a Trident that I converted over to yops. A few of them required me to add another resistor (I can’t remember if it was ghosting or something else). I just measured the resistance of a stock yopsicle and then soldered on a similar sized resistor (approximately doubling the resistance). From memory I only needed to do a couple of them.