[Elecraft] k3 tuning power question

[goldtr8 at charter.net]

I have a K3 100 watt version and I am curious about what a proper tuning 
outpower should be to minimize the potential to damage anything.

I have been using 10 watts but I think that I am then at full power for 
low power operation amp so I am thinking I need to have the high power 
section transmitting at a low power.  So I am thinking that you need to 
be above 12.

Bottomline is I am not sure how this part of the radio really works and 
sometimes if I start tuning and have a bad match it takes me some time 
with the manual tuner to get the swr good.

So any pointers on the best way to set the radio up would be greatly 
appreciated

Thanks
Don
KD8NNU