Benny, I think you rate your machine to low as I have not seen many who have a working router that big complete with supporting table and is reliable enough for you to source outside jobs. I am sure your machine does what a lot of much more expensive machines do and just as well, shopbot,ezcnc etc. I know of an AXYZ machine that just cuts plastics and mdf for signs, I am sure if they had the knowledge they would have tried to build one themselves.
After Spalm linked me to your thread I decided to use belts for my long axis when I saw what you did with yours, which now makes my task a little more simple.
One great thing about designing and building a machine yourself, you know how to fix it yourself.
Jason