Just wondering are there any upgrades for Gottlieb system 1 flippers? By upgrade I mean make them more powerful. I find on my genie and my buck Rogers they just don't seem strong enough. I have already Resleved the coils filed and gapped Eos switches and the cabinet switches and cleaned the flipper shafts and bushings. They seem fine on my sinbad but they just need a bit more power to be able to make the vari target shot on buck Rogers and speed up the game on genie. Any suggestions?