If it's an open source project look for the files - lots of people on here use sketchup so have a look through the project section. There are also sites which people use to sell their designs, but if you are looking for designs to play with in sketchup look here first. Alex.
Thanks for all the information. My system is down so as soon as I'm back up I'll take a look.. once I take a look at it I might have some other questions on how to get that into the software to run the mini milling machine? Thanks again