So I have one of these in very good condition. Is it worth upgrading? Like a new string, cables, whisker biscuit, etc.? String and cables are in good shape it's just that they are so old I don't trust them. Draw weight is 70-80lbs. How much can you drop it? It's a bit much for my old fat butt. Probably ought to just buy a new bow, but this thing has hardly been shot. Thoughts?