RE: Top Flite Staggerwing
Nick, looking good.
Take your CG measurement right on the outer rib where the wing joins to it. You should be perfect there. Your marked position looks good.
Go easy on adding more elvaor movement, unless you have a 3 position switch, and want to add more for taxiing on grass only. Switch back to listed max movement just before starting take-off run. If you want to add a little more, 1/4-3/8 inch max. 30% expo good.
Good luck on the maiden, hopefully you will get video.
Don