That's good to know Mike. I've tried to research this in the past so that I could use the MT-24 on my 645Z.... with Canon MT-24ex Macro twin flash. I have always wondered if the Canon twinflash would work in manual mode on the K-1 or whether it would destroy either the camera or flash. Decided to try it today and thankfully it worked fine.
I'm sad to say that I sold it.