Definitely.
First make sure you’ll be able to reach the left/right/front/back limits of your spoilboard with your surfacing bit, by jogging manually to those limits.
Your surfacing op should cover the whole top surface of the spoilboard or your will end up with a recessed pocket.
Once that’s done, tramming your router is a good idea. There are various ways to do that floating around on the forum, here’s a simple one if you have a dial indicator:
Similar idea without the dial indicator in Winston’s video here:
