I'm new to Rev flying and I'm curious to learn about the Rev Pro "No snag" handles. I have an idea as to what this handle is all about, just by the way it's called. I really want to know if it's worth buying and investing some money into. Plus, what is the difference between 13" and 15". Are these type of handles more for the "professionals" or can someone new to flying Revolution get some valuable help/assistance in learning to fly by using these type of handles? Can anyone please help me out? Thank you.