In a fullsize crop (attached below) of another image I took at 55mm f/5.6 (60 second exposure) you can see some star trails at 60 seconds, my platform obviously wasn't exactly aligned, which is something i'll have to work on.
However when it's reduced to web size you don't notice it so all is good!
Also, focusing while looking through the view finder at some stars is very difficult! I need to get DSLRFocus