Recommended Size for Shaft :
7/7.5mm Shafts use Bushing 13.5/14/14.5mm
8/8.5mm Shafts use Bushing 14/14.5/15mm
9/9.5mm Shafts use Bushing 14.5/15/15.5mm
10/10.5mm Shafts use Bushing 15/15.5/16mm
11/11.5mm Shafts use Bushing 15.5/16/16.5mm
12/12.5mm Shafts use Bushing 16/16.5/17mm
Using different size will gave different feels when the bushing hits the Base bottom hole (gate), smaller bushing will let the shaft hit the collar first, while bigger bushing will hit the gate first. you can try some combination and see which feeling is more comfortable for your play style.
Choose the weight:
- Plastic Bushing made from POM. Light weight, barely put additional weight, good for dynamic movement. Plastic material is maintenance free.
- Metal Bushing made from Brass. Weight is heavy and helps to counterbalance the handle. Good to build repetitive movement rhythm.
Bushing needed to install bearing actuator.
Ring is not required for "GL Shaft" model
you can learn more from this article.
Because it puts the point of contact lower than generic actuator, you will need to compensate using slightly bigger actuator compare to generic actuator.
Golden and Silver Bushing will make metal to metal contact to the spring, better if you put some lube on the contact area to reduce friction when the shaft spins.