Well, I didn't see that about the plug inh is thread, but that would bum me out. Or at least confuse me. Or at least make me think we have a VERY conservative bench. The bench we used though, as been within 1-1.5% of Holton's 600...and Don Little's 110. You're going to make me have a BIG brain ache now: It was very damp outside and we were in a garage with the door up....GRRRRRRRRRRR!!!