KG0MN,
Most of the LnR crew are at the Hamvention in Dallas Texas or packing to go there. The command set is the same as the Kenwood 2000 or (I think) any modern Kenwood.
The Y adapter is as you say easily homebrewed. Donner Digital may make one for you. It’s worth a try to contact them.
73 for now,
QRPME