Update on the x21. I was told a couple of things to do by some folks . I did them Friday . It ran like a different boat. You could not make it porpoise at 60 mph you could let go of the steering wheel & drink a water going down the river BUT it would only do 60mph. I happen to run upon a tempest 26 prop like Cashew Chicken. told me to get bought it. I will try it tomorrow are maybe Wednesday. Hopping it is a little faster and still handles like it does now.
You need 70 minimum. Xpress can be a difficult set up as none are exactly the same with big weld down the pad