@somethingnicer ah good news! 
You could stay with 2 pickups and use a push pull as a pickup selector. But as you’ve gone back to your original plan, all good!

Plane across the grain to take the thickness down to close to final, leaving about 0.5 mm depending on tear out.Sand or scrape the last part smooth. 

@liebe hey Dan, thanks a lot. I ended up plugging the hole and just going down to one pickup… this was my original plan to begin with so not worrie. I’ll just cover the pickup hole with a pick guard

I found also in books of lutherie mentions of these toothed blade, I’ve never used them, but maybe I will try.
Thank you @russ