cheers for posting the pics Ozzbike, I'll pull the neck of my PBH and fix the truss rod ! I built that a while ago and didn't know much about the truss rod then, don't think I even set it up properly !
SD pups look great.
Not sure you need to go that fine with your sanding, 800 grit is almost polished and may not take the stain.
Think 400 grit on the body and 600 grit on the neck should be ample.
Fine steel wool between coats