Hi Lasse,

That would be really helpful if you could send me that tutorial, I want to ideally solve it myself and this will help with that. I knew I wasn't quite right with my calculations but was unsure of the steps to fix it, although should be able to with guidance and illustrations. Although it may spring up more questions! If you could please email it to a.richardson@abertay.ac.uk I would greatly appreciate it.

Many Thanks,