When I strum fast and hard, I notice that I am using a lot of wrist, instead of moving my arm up and down (bending at the elbow) that I notice is common when others play punk. Also, I sling my bass kinda low, but then have trouble fretting certain notes/intervals (my pink won't reach!). Lastly, my pick is scratching against the strings, and it is annoying. I know that punk is about not being perfect, but I'm trying to recreate the sound, not just play my own style. Any tips?