ok i own a 56 cm langster '06 and i'm planning to buy an iro angus frame. is there any significant difference in sizing between the langster and the angus because of the differences in geometry? i've measured the top tube and seat tube and standover on my bike and it matches up best with the 56 cm angus. would the 56 cm angus fit me appropriately? i should have mentioned that i'm about 5'10''. thanks guys!