Lookin' good! Have you sanded the parts sheets on the underside before trying to break out the parts? A few swipes with 150 grit will make the parts easier to pry out of the sheets.
The nothches in the bulkheads add un-needed strife to the build, too. The plane will come out looking cleaner if the bulkheads [fuselage formers] are trimmed down even with the bottom of the notches. In other words, wipe out the notches and just lay the stringers on top of the formers. I use spruce instead of balsa stringers in some key areas. The concern is whether the plane will survive the beating it gets trying to get an engine started, of course with electric power you don't have that to worry about and should be able to build as light as you want.