I'm doing up a Black Knight that has Gottlieb Flipper mechs and bats in it. Was done because of the hard-to-get Sys7 flipper units and the unreplaceable coils stops
Iam looking for whole Williams Sys7 flipper units too.

I understand that you can fit other later model Sys 11/WPC Williams Mechs in it. I have a High Speed parts playfield that Iam considering raping for the mechs but it only has 3 not the 4 baseplates that I need.
Does anybody know if the high speed flipper mech baseplates are the same as WPC? They all look similar to me but could have suttle differences.
If so, then I'll take the base plates of HighSpeed, put them in BK, purchase another baseplate and get Sys11 flipper rebuild kits.

Other than that, I could just get WPC base plates and rebuild kits and there is a seller in the US (Pinball Life I think??) selling brand new complete Sys7 flipper units with the coils and bats for $35.00US each (Shipping extra) PL also has complete WPC flipper units also.

What do you guys think is the best course of action?
Appreciate any response.

Regards, Cliff