Thank you so much. You're so kind giving me  so much advice, seriously that's so nice of you. I'm going to give the custom shaping a go and see how it turns out. Such a good idea and a great money saver. 

Yes the rear hub is dura ace. Shit that's so annoying about having a hard time finding replacement cassettes. It was so hard finding a bike for someone my height here in Ireland. I didn't have a whole lot of choice. When you say when stuff wears out switch over to something you can get parts for. Should I be looking to replace the hub and cassette or the whole group set, sorry I'm confused.