I am VERY pleased withhow the butterfly photos turned out. I actually didn't use any extention tubes, I just percevered with the macro lens and finally managed to get closer to my subjects after alot of time and fiddling around.
The process in getting a quality macro photograph is very challenging. I have found that you need incredible patience and time to produce around 3 out of 50 good photos. I am still keep to learn more about photography, macro photography inparticular.