for nose butter threes, fully commit to it, its easier if your tails aren't that high up on the first 180, and then on the last 180 really flex forward and put your hands down near the nose of ur skis and if u do it right u will even pop out of it, and for the 270's out, if u watch a video of someone doing it, u will notice its all about angling your skis so u can push off the rail, thats why its impossible to like 90 onto a box and 270 out the other way, you have to angle your skis