I found this spreadsheet from this forum: https://docs.google.com/spreadsheet/ccc?key=0Asw52Abkg8IIdEF6d0lBZ2poOC0xU3VPTXM4TlVGRkE&usp=sharing#gid=0
That great part list encouraged me to do my own ultimaker 3d printer. I have now ordered nearly every parts for that project.
Few days ago I notified that original belts are xml and I have ordered gt2 pulleys. It's not bad thing at all because you can see: http://reprap.org/wiki/Choosing_Belts_and_Pulleys
So...Gt2 pulleys and belts should work fine but I have no idea how long those belts should be. Only Gt2 belt which I now have is "Closed-loop GT2 Belt, 101 Teeth 202mm Long". What are those other gt2 belts which I will need in my project?