KSA250 mains Voltage conversion and a question about versions

Hi all DIY hifi lovers!

Just 2 days ago I have aquired an old Krell KSA250, sold as defective.
It turns out that the soft start board (mostly the capacitors on it) is toast. Working on that now.

I'd like to switch the unit from 220V ac to 240V ac. Could anyone help me with the correct position of the 2 switches for 240V ?

Also: Given the arrangement of the loudspeaker terminals, mine must be version 2 or 3. I have Googled a bit but can't find any information on the differences between the 3 existing versions.
It would be great if someone could lift this curtain for me.

Warm (when the amp works "hot"!) Regards from the Netherlands,