Wow, despite not looking 100% perfect (the later screenshot) it sure draws circles friggin fast!

Sadly I can't help much though because we did not do a lot of trig at school (it was only people who had advanced maths classes) and most was forgotten since my last math class was 7 years ago

Well that is kind of lame that they only left trigonometry for more advanced classes. Personally I learned the basics and such it my freshman and sophomore year (9^th and 10^th grade in USA). It really isn't that hard of a concept to learn. Maybe I'll try to throw together another tutorial (since Builderboy already has here here) before I leave or have one for when I get back.