An update on this;
I got my DIY stuff and make a 20mg/ml flavorless juice, which doesnt taste too bad. I had to wait until payday to buy some flavorings from perfumersapprentice, which should be here by at least Saturday (I hope). With what ive made, there isnt an after taste at all. we'll see if the flavorings that come will add a long aftertaste. If after i add flavor there is no aftertaste, then awesomevapor is likely the cause.
On a side note, they sent a pineapple flavor which was alright by itself, but when i drank mountain dew afterwards, the taste was just just awesomely magnificent! The pineapple and the mountain dew bring each other to spectacular new heights. I drink a lot of mountain dew so I made damn sure that I ordered extra pineapple flavoring from perfumersapprentice!! lol.