Keith bravo for your work on NV Ram, beware of Chinese knock-off and old date code parts.
Use machine pin socket
Full cal is needed after RAM replacement
See service manual and proper test equipment
Can be hours or days first time.
Trigger issues described may be marginal trigger hybrid U400, or symptoms of damaged A5 control board due to SMD lytic corrosion
Beware of hidden damages in A5 visa, parts or inner layers.
Corrosive liquid and gas of the SMD lytic flow over the board, even if caps look OK
Tell tale is dull, green pads or joints, near the DAC ref area on A5, controls jumpy or intermittent
Every SMD lytic needs replacement.
Every nearby component and trace is suspected
Bon chance
Jon
Jean-Paul