I designed My floatable version of the 3d benchy on autodesk inventor. I did this as a school project in a rushed time so it is not perfect. 

Basic settings:

Nozzle temp: 215

Bed temp: 60

Organic supports everywhere- ( You can print without supports but at your own risk)

Print with a brim

Layer hights may vary with a different printer

Infill 30%

Print speed 70 mm/s

Any questions or comments just comment and ill help you

I scaled up 300% and put the face down

remixing is welcome so please do

I printed this with chocolate Overture PLA Professional. 

I made this with stock ender 3 with a fan mod.

It printed good first try

It would really help if you subbed to my youtube channel: Tha3dPrintingG0D