Thank you for the information on how to work out vibration. I don't normally spin at high revolutions, but for certain types of fiber that would be helpful. Looking forward to the new fold spinner that will accommodate higher speeds.
thank you for this! I actually bought a 6 a few years ago and have unconsciously limited my use of it due to vibrations-- mine starts shaking hard if it is beyond 2, which isn't that fast, considering I wanted to use it to ply, and I mostly spin laceweight. I'm going to try these!
I had really bad vibration even at low speed (very loud!) and they got a lot better when I pinched the uprights of the front maiden. So I ziptied them and I've had no issues since.
Taking the balancing idea a step further a user adjustable balance trim feature could be added by suspending a thin plastic balance weight (moulded or 3D printed, maybe 10 x10 x 0.5mm?) in between the stabiliser bar arms, located in place by snapping onto the arm bars. The balance can be levelled by moving the weight along the arms.
I personally think just adding a drop of glue a few times is better since it would be more durable and less likely to change over time. That said, maybe what you proposed would work. It isn't something I have tried.