[Elecraft] K3 antenna tuner.

[van fair]

I am trying to decide on an antenna for use at a DX location for 40 meters and up for an upcoming trip to V4 land. 

I can put up an inverted V dipole at 40 feet high with a length of up to 45 feet on each side of center.  I plan to use a 4 to 1  Balun and 450 ohm window line 30 feet long.  

Anyone have any experience on how the K3 antenna tuner would handle this antenna. on 40 through 10 meters. 

Thanks for your help. Van W4GIW & V47GIW a ham for 59 years.