I gonna make a new video I think, there is not enough info on how to operate in its normal fashion and I'm sorry for that. If you centri speeds up there not enough tension on the needle. The side grooves are for extra small bands not your primary band location. That area is to close to the needle bar for tension support. Using that placement will let the motor spin without capturing the full centrifugal force. In a sence the weight is spinning so fast it can't pull in Etheir direction. The more tension on the bar the more the weight will react to g forces in return giving you the correct stroke. Running your centri to fast will defeat the purpose of capturing the gforce we are looking for. I'm gonna make a whole new video making this technology more understandable and stress more that this not your typical rotary...