Said of a worthless hand;
"He may be slow, but he sure is sloppy."
Said of a slow hand who probably is worthless
"You have to drive a stake to measure his progress."
Said of a very good hand;
"He's a fire and forget missile." Give him a job, you don't hear from him until it's done, faster than you thought. And, he tells you how he improved your idea and save money to boot. (Think I'll keep that one around a bit longer....)