seeing that your using a bushing you want to avoid any dirt/dust getting in between the hub and bushing that could cause premature ware or binding . You prob. be OK with what Joe is saying depending how and where you will use it . for me , I would at least have some kind of seal or use a sealed stainless steel bearing with a space between for dirt/dust to fall through . OTOH , your doing a great job
yes , cad is a great tool
