Here is the DIY Forum link:
http://www.e-cigarette-forum.com/forum/diy-e-liquid/
That is a very HIGH concentration. You really should read up a little bit before you mix/waste anymore.
Not many experienced mixers mix a new recipe at 50ml. Most do 3ml at first to taste it and see if it is worth mixing in larger quantities.
Did you wash your clearomizer before adding juice? Many clearomizers taste "oily" straight out of the box. (Machine oil)
Do you have more than one clearomizer to taste different concoctions?
Do you have any pre-made liquid to tide you over until your mix is perfected?
It is very much a trial and error thing when you DIY. Most of the time the first mixes you attempt are not going to be that satisfying until you have more of an idea what you are doing and how much flavoring to use. Each flavor concentrate has its own unique percentage in order for it to taste "right." Some flavor concentrates just plain suck.
DIY is not hard, but it takes a bit of patience. You can't mix in a hurry and then decide to smoke a cigarette if it doesn't work out! Slow down a little bit and read up on the subject. You will be a "pro" before you know it!