Hi mike, I see you've just ordered the TB10. Try playing any bass in the vertical position, esp a Fretless.
Don't stand behind it, but beside it. Lean the E string side of the bass body against you - looking across the fretboard, the preamp panel facing you.
Pluck it firmly, plenty of flesh from your finger along the string, and pull from the shoulder.... ie "play it like you hate it".
Bass is the new black.