To upgrade or not to upgrade??? (my cranks)

:thinking: I just checked the kh moment cranks and they were $130.00 (AUS) omg. Im gettinga nimbus with 127mm cranks. Now i dont know whether it would be better to use my 150mm cranks from my other unicycle or leave the 127mm on the nimbus. Just to let you know i am a beginner but i dont know if that makes too much difference. Maybe ill do a poll