I too would really like this information. We have purchased a 2S1 commutator and have successfully used it during the CQ WW CW with two Yaesu FT 1000MP's. I would also like to get it to work with my K3 and one FT 1000 MP or maybe even two K3's.
Any information is useful since my technical knowledge is unfortunately limited.
Many Thank,
Maarten PD2R
Maarten, PD2R
Member of the PI4DX contest group
www.pi4dx.com
Elecraft K3 nr:1849