Hi Robert
The motor did not have the power required!!!!
I cruise around with the Sea Hornet at 1/2 throttle looking cool.
A bit over scale speed, but, the extra power gets me out of the way of poor drivers.
I can limit the ESC on my TGY-I6(very good piece of gear) handles up to 20 models.
Also $5 AU different between motors is not a big different and the same for the ESC's 30A and 45A.
Our canal is tidal but at low tide still OK.
I have a test place with the tide in is 500metres x over a KM with a canoe available if required!!
Harry