Not a bad looking kit, seems well thought out. No indicator LEDs though.
One point I raise with all the aftermarket rectifier boards is the need
for some sort of electrical protection shield to help protect the
operator/technician from accidental shocks. The Pinhead board does
include a standoff plastic shield to help avoid the risk of shock, one
of the reasons I carry it.
The original Bally had a slip on plastic safety cover that was very
nice, and was usually missing in short order as technicians tossed them
away. I never liked that practice and teach my staff to keep safety
covers on or replace after working on games.
I wonder if there is a market for those, it would be interesting to
remake...