A great new board has been release and can save you some board work when things don't go your way.
https://pinside.com/pinball/forum/topic/special-solenoid-saver-board-for-wms-3-7
http://nvram.weebly.com/repair--conversion-kits.html
https://pinside.com/pinball/forum/topic/special-solenoid-saver-board-for-wms-3-7
http://nvram.weebly.com/repair--conversion-kits.html