Darf.. a bad 'whatever' can sometimes blame his tools blah blah blah.. So you need to set your stilts up so there comfy for all use.. CAnt be changing them back and forth to do different stuff! that would be a little silly..
Flipping with lots of height can be harder for some, but the main thing with doing different type of fronts is al to do with useing your arms in conjunction with your bounce.. Your throwing low and rotating very close to the ground? then if you want more height its quite simple to say that you need to throw your arms UP towards the sky more to get more height with your flips.