going and redoing every IDC plug is probably overkill. Change the high current carrying and any suspect/problem connectors to crimp style.

Better use of your time is changing the round headers to square ones, but again probably overkill and takes good desoldering gear. The round original headers are usually cut nearly flush to the solder side of the board making the solder more likely to crack. Plus the round shape of the posts is not ideal.

https://www.taydaelectronics.com/connectors-sockets/wafer-housing-crimp-terminal/serie-2400-3-96mm/wafer-connector-3-96mm-9-pins.html

They are molex knock off despite what the website says. On my test gear that goes in and out all the time I seem to get just many connector wipes on them as the genuine molex cut to size headers before the plating wipes off. Recommend part for wms boards that use the locking channels. When there are locking channels I like them better than the cut to size ones.

I personally don't like the wrong kind of connector wafer blocks installed! =D The locking channels are good and WMS used them for a reason IMO. You can use something to press upon the lock channel when pulling the plug out to make it easier. Just pulling on the plug will make your fingers hurt.

Everything on the WMS MPU and Driver is nine pin except for two four pin. I think its 16x 9pin and 2x 4pin + the interconnect to repin the entire MPU+driver.

There will be no clearance issues on this MPU for the NVRAM.