Ok. Since no one has tackled this yet, I thought I'd start a thread and build up info needed so either myself or someone here can do this when we upgrade a motor or replace a rim.
The stock Bafang 350w motor has 18 holes on each side of the hub for a total of 36 spoke holes.
The stock rim has 18 holes on each side as well, alternating position left to right, for a total of 36 spoke holes.
The spokes appear to be 8.5" long and are bent slightly at the nipples to accommodate the lacing pattern.
First task is to get the spoke lacing pattern down.