I'm putting the cart before the horse here, killing time waiting for the next batch of 210EXTs to arrive...

I know the unit comes with a pair of quick disconnect fittings, but what's the thread size on the back of the machine where the QD fitting is attached? I recall it's male - is it NPT (1/8" or 1/4"?) or one of the odd flat threads used for gas?

I'm cooking up an idea, and if it's an odd thread I'd like to get the right fitting on order.

Thanks,
Richard