I have the 60 U CAN DO with a YS FZ-110 and I love it. I want to get the 40 size for my son. I was thinking of putting a OS 55 AX in the 40 U-can-do. Can anyone out there give me an idea if this is too much engine or any advise on this combination or a similar 2-cycle engine you may have to the OS 55 AX and how it performs in the U can do 40?