Originally Posted by Bloomin Untidy Musician

i have managed to resolve the situation by working on lots of pedals, flexibilities, and reassessing my single tongue position.

I discovered that my single tongue was striking quite far back on the roof of my mouth, thus making it extremely tense for fast tonguing and as i have also discovered, encouraging an overbite. Since i have relaxed the position of the single tongue, and started striking the roots of my front teeth, i have found that my overbite has nearly all but disappeared.