If 24 hours is not enough the difficulty should adjust downward. If 24 hours is too much the difficulty should increase. Adjust accordingly roughly every 2 weeks.
Discussion
That's a fine answer!
Allow me to go off on a tangent. In snort when replying to a post it says "What's on your mind?"....well my wife just asked me about those women who get surgery to get that humongous butt. "Can they even sit down properly?"