the learning tricks and quality of yoyo ratio is that if you have a good yoyo its easier to learn tricks.
Iron whip and slack trapeze: learned them on an 888x or protostar or dm2 (can’t remember)
Can do iron whip and slack trapeze on a yomega raider.
could i learn them on a raider? probably not. Now that im good with them i can do them on a raider.