Specifically, I'm having trouble spacing the turns, knowing how high and long to build the berms, and getting flow figured out. I know that's pretty open ended, but any sort of guidelines would be much appreciated. I guess this depends alot on many variable factors, but I'm looking for something that says "in general, singletrack turns should have a radius of at least 25 feet, while switchbacks can have a radius of 15..."

something similar for dirt jumps, and pump tracks would be cool too. Thanks in advance!