Everybody who have a ProBoat River Jet knows that the original nozzle is not efficient on little steering changes, then it makes this boat horrible to control. So I decided to design a new nozzle with the same diameter than the propeller outlet, and it works very well! I adopted a jet plane style for the nozzle only for the look. It mounts in replacement of the guenine part. I also designed a propeller ball only for the style, this part is not mandatory for the nozzle efficiency. It's simply clipped on the propeller outlet. Printed in PETG for the solidity.