The japzap works well for medium height steps but at what height step would you need to use a different technique like a splat? I know there are different variables but lets say good traction and a plain vertical step. What height requires a splat?

Im far from ready to attempt a splat but I would like to know what height to work towards using a japzap before I need to focus on a new technique.

Some times a splat is used to keep momentum going. So it has nothing to do with the size of wall. You need a splat to get over under cut rocks, so it just depends on how good you can zap. A really good rider can zap over 4 ft obstacles. It is fun watching the top riders as they splat everything with out much effort!