Pedantry rules
Be aware, a BEC (battery eliminator circuit) is not designed to regulate output to the servos, but rather to the (much lower current) receiver in an r/c system. It eliminates the need for a separate receiver battery.
And the current spikes are almost certainly due to excessive friction in the canard pivot system. Miniature ball bearings may be a solution. Perhaps a pair each side supporting each canard shaft.
Great project - keep it up......
Biting the hand that feeds IT
