Had these rollers lying around, from a DIY shopping spree a while back. They are really cheap, originally for rope of course.
I also had some aluminum tube with just the right diameter to serve as axis - so I decided to do a variation of my 4x4 design, but in wood, and for tubes.
The design came out really well. It gives me about 22 cm of a draw extension, ideal for the task as it is easy to load a ball into the pouch and it does allow full butterfly.
This is really powerful, especially with heavy lead balls!
It is also not so hard to make, I consider making a tutorial video soon.
Jörg
I also had some aluminum tube with just the right diameter to serve as axis - so I decided to do a variation of my 4x4 design, but in wood, and for tubes.
The design came out really well. It gives me about 22 cm of a draw extension, ideal for the task as it is easy to load a ball into the pouch and it does allow full butterfly.
This is really powerful, especially with heavy lead balls!
It is also not so hard to make, I consider making a tutorial video soon.
Jörg