[Elecraft] ATU question

[Tim and Nancy Logan]

Hi folks - 

1 - As I understand it, if I attached the K2/100 to my LDG AT-11MP
tuner, the K2/100 would drop to twenty watts whenever I tuned. Once it
tuned at twenty watts I could then drop down to 5 watts and operate QRP
through the LDG - right?

2 - I also have an LDG Z-11. What exactly is it about the Z-11 as well
as the K2's current QRP tuner that does not allow them to be used at the
higher power? I'm just asking a straight forward "how does it work"
kinda' question!

Thanks, Tim NZ7C