@crashman, I've only driven the Zbox a little bit. It's lock in is probably similar to StarGazer, which is tougher to lock in than PP Classic. However, Zbox eliminates actual weight adjustment, except for maybe a few broad categories on the skier such as normal, light, feather, and heavy (not their actual names). So, there may be less fiddling with that stuff and more consistent lock in with Zbox. Zbox needs a smooth throttle up. I don't think you can get away with ramming the throttle down and pulling back, which can be problematic in all speed controls. You can't floor it either. The best way is to push the throttle to a certain amount beyond what is required to get the boat to the desired speed, but not overshoot too much, and leave it there. It's all in the throttle up. Once you get practiced at throttling up, the pull is good.