I wouldn’t change flippers as you would find the game out of balance and too easy to get the SLICK and CHICK completed.
What i did was bring the pop bumpers back into spec by removing 2.5-3 full wraps off each coil. That brought my game into balance. I have not encountered another SC that plays as well as mine.
You are welcome to stop by and play mine to see how it turned out. I’m sure I can help guide you through other adjustments on your game to bring it into balance.