First off this is drewpys idea, cheers mate! I thought it was a great solution so posted this maybe it will help someone out. I needed to protect my swing arm from the chain and remembered drew did something with plastic like this, anyhow heres what he did (from what I understood) he used black I'm using clear perspex because I had it lying around
So make a pattern with cardboard, then trace it onto the perspex and cut it out.
So make a pattern with cardboard, then trace it onto the perspex and cut it out.