I got a shakey 5.2m with a 70hp tohatsu on the back. I have recorded 36 knots (GPS) with 3 up. I'm too scared to try it on my own cos she's lively trimmed out and I can't steer and hold/look at the GPS at the same time
I also think I can up the pitch on my prop by an each (I think its a 15" on there at the moment).