Check out the Paper Airplane Guy showing how to fold and trim the Nakamuro lock design. Remember that to achieve a long duration flight with the PowerUp you will need a larger wing span.
POWERUP 4.0: Flight Manual Bundle
POWERUP 4.0 Pro Bundle
POWERUP 4.0: Dual Plane Bundle
POWERUP 4.0 Nightflight Bundle
POWERUP 4.0: The Ultimate Bundle
Paper Airplane Book
POWERUP 4.0 - spare parts Kit
POWERUP 4.0 ACCESSORY KIT
MAKER FOAM SHEETS
POWERUP 4.0 Night Flight Kit
Family Squadron 9 Piece Pack