Anyone else having trouble moving from 3 buttons to 4? I've mastered easy (get me!) but I'm having a nightmare getting the hang of medium, that forth button is really playing havoc with my brain. I'm not sure if it's just a case of practice makes perfect or my technique is wrong. I'm basically placing one finger over each of the buttons, but my little fingers is bloody usless, I'm wondering if i should by moving my whole hand up and and down the neck instead? Any tips would be most grateful, I bet Clapton never had this problem.