Decided to do an upgrade on the rocket last weekend.Swapped the 735 for a 865 l have had for a while.The swap went well but l ended up having some blockage in one of the cooling lines making the chamber just past sizzling point.l mean hot! Only rode for less than 10 min and took it home to clear the water lines.l have 2 props I'm trying right now.One a 11/17 hooker and the other a solas concord 13/17.From what l understand the skat 13/18 is the one to use with this size engine in the rocket.l am running the hooker right now and will change out to the solas after the next ride.Right now l like the 11/17 in the ski.But the other prop should be better.Stay tuned!