I'm new to the board so I hope I'm posting this in the right board. I have a 2001 Santana SE with the covered pickups. I've noticed that when I adjust the tone knob that there is no definite tone change until I get down under 3 and then it's a muffled sound. Is this normal, a bad tone pot, or the pickups. I read someplace that the original Santana SE pickups with the covers had less quality than the open ones which I think are 245s. If it's the pickups what do you recommend. Is there a difference between an SE 245 and SC 245? Thanks