Using a system 1 coil stop and modding in an extension spring can help a lot, but the whole mech just isn't the best designed. Even with a perfectly rebuilt and tuned mech you only get performance on the level of a Williams mech with 1000 plays. For games like my Surf n Safari (which the ramps on this seem similar to), I haven't had any issues with the regular mechs after some tweaks. On games like my stargate they just couldn't cut it though, and I swapped to Williams mechs. I used ones from pinball life which had an extension spring, a high voltage eos+cap, and fl-11630 coils, and the tallest coil stops, and it worked well

The system 1/80 coil stop is about 7-8mm tall. The system 3 coil stop is about 2mm tall. So you get way less travel with the older stop, which means the flippers don't go up really high, which makes the game play more like other games