The consensus is - "High Tap" the transformer, or install "hot" flipper coils.
"High Tap" - All coils fire with more strength
"Hot" Flipper coils - Just the flippers are stronger
Do both - and you will need a new plastics set !
"Hot" coils are a good idea for pinheads that have several DMD machines and are used to playing FAST machines. So an EM is a bit of a borefest. "Hot" coils make the shots faster.
I recently restored a GTB Canada Dry and the owner wanted hot coils because the upper target bank is a long way from the flippers. Worked a treat - but - When in sections where the targets are already dropped, the ball hits the rubbers so fast the ball "jumps" off the playfield and hits the glass - but not all the time.
My "personal" preference - Clean and wax the playfield often, and you won't need to modify the machine. Canada Dry is a machine that benefits from "hot" coils. If you are rebuilding the flippers with new parts and you love EMs - You don't really need "hot" coils. Maybe buy a set and then swap them over - just for the experience ?
