How to build good jumps? Not sure if this is the right place for this... But I'm wondering how I can make 'good' jumps. I've made a few using a 1 tonne digger.
 


I had the tabletop with the pallet a gap at first but I made it a tabletop for more fun. They're okay to jump, but the problem is the landing is really soft and I've watered it, compacted it, done everything I can think of any it's still loose dirt?? 
So my question is how can I make reliable jumps?
You could probably rent a Wacker ( yes, that is the real name ) at a local construction equipment rental store. It is a tool that ground construction workers use. It is basically a really heavy steel plate that an engine sits on. The engine vibrates the whole machine and the weight and the vibration compact the ground very tightly. 

You'd have to work in layers. Don't expect to compact the whole mound all at once. That is not the way it works. 

The giant rollers on freeway construction sites do the same thing.