Is it absolutely necessary for the fretting hand fingers to be at, or nearly at a perpendicular angle to the strings in order to play bass correctly? When I first took lessons my teacher said this was important. I have seen most of the YT videos that show this as being important. I, however, find it very hard to do and my fingers are usually slanted back towards me somewhat. Is it ok to slant them a bit? I was watching Stanley Clarke and notices that his fingers are not completely perpendicular. I have had carpal tunnel release surgery in both wrists... Not sure if that makes a difference or not.