I m trying to get to grips with some finger style blues . I normally play an electric with a pick but I m playing more acoustic these days. However I m having major problems trying to get my thumb to pick the alternating bass notes. Well picking is easy but the timing is the problem . I m alright for a bar then everything just starts to get into sink . So some how I need to learn to keep the thumb at a steady rate and not affect it when I start the melody. Hopefully you understand what I mean and if you can give me any tips that would be great. Thanks.