Miniature boat electric engine kit-010 alternative

This is a miniature boat electric engine with an electric motor and a AAA battery to replace the kit-010 small model. The idea came because I received the kit-010 model when I ordered my Bambulab P1S.  Therefore I felt obligated to print the boat model to go with it.  And since my brothers have 4 kids altogether, I figured I needed 3 more engines to avoid a Christmas war!  You will need a small electric motor.  The design was made for this specific very popular electric motor (See link below). A single AAA battery is needed.  The design was done so that you won't need an ON/OFF switch and you can create the contacxts with aluminum foil paper (See pictures).  There are 2 versions, one short and one higher.  That is to change the center of gravity to make sure your model floats!  To be compatible with all boats models made for Kit-010, you will need the high version to be able to clip the engine.  But it may sink your model because of the weight so you'll need to print a keel (Just like for a real boat) to stabilize it.  Look for one in the print profiles.  There is one gear with a smaller hole of 2mm that is intended for the engine's shaft.  The 3 other gears have a hole of 2.75mm to fit 2.5mm rods.  The very easy way to find 2.5mm cheap rods is to buy knitting needles #2.5 (check the pictures).  The lengths needed are shown in the pictures.

Electric motor example link : https://www.amazon.ca/dp/B07BKXJM71?ref=ppx_yo2ov_dt_b_fed_asin_title