[Elecraft] KX3 with external coupler

[Rick Robinson]

I am thinking of ordering the KX3 tonight. I will most likely order it with
all accys. I have looked through the manual and some archives and would
like to verify one thing and ask about another.
First is the built in ATU. It looks like it can be set to bypass even if
the atu is instaled. Am I correct in this assumption ? The other is ...has
anyone used the KX3 with a coupler such as the SGC
models. I really enjoy using the SGC as my antennas at home are limited and
for portable use it makes for a easy setup. Thanks in advance...W8ZT