I agree that the saw is not that acurate and it does use vee rollers, I've priced them and seem some what costly.
The use of pulleys was something that came to me this morning. They are available in the required sizes for what ever size rod you may choose.I'm going to the hardware store today and do some more research.
I do believe the pulleys would need to be polished to remove any roughness, before using. |