That's a lot to take off in one treatment, no wonder you cramp. Can you drink less? Ice cubes, smaller glasses, suck lollies, check the labels of your food for salt content in order to eat less salt, etc etc?I hate to hear about the cramps from guitar. That would suck.
No you're right, its not so bad. I've looked around at other people's amounts, and there's other people taking off 3 alright. I pull my head in.