Nice one Kris!

I only just came across this thread and recognized the Arpro, I'm running one myself, rebuild for racing on the 30 x 30 x 30 m course.

I couldn't help smiling at all the responses, as the problem was very obvious in the first pictures; the motor wasn't watercooled at all!
Just wrapping silicon tube around the can does not constitute a cooling coil....

I'm glad you got a proper cooling jacket and the boat is running fine.

Congrats!

Regards, Jan.