THANK S GUY'S I'M RUNNING A DUMAS TUNNEL THAT IS WOOD WITH A K-B 3.5 WITH A GOLD CARB AND THE PROP IS A X437 IS THAT OCTURA?I BOUGHT THE BOAT FROM RODNEY, HE HAD A 7.5,3.5 TWIN BOATS I BOUGHT THE SMALLER ONE.WHAT IS THE BEST WAY TO SHARPEN PROPS I HAVE A PROPELER BALENCER FROM MY AIRPLANE DAY...