fyi: well-built units of this qrp tuner are now available from a large online seller... snagged one, and i am happy with its performance (i have an ATU-100 set for 1W tuning)
the tuner has a stereo jack for connection to a 705... tuner mimics an AH-705 tuner... can be started from the 705 or you can use rf sensing (autotune)
has two built in batteries... unit can be turned on/off... goes to sleep between tunes...
plug it into your pc and drag any new firmware on the mounted device to upgrade... no PIC programmer required
10-15W power limit AFAIK... i stay under 10W... very compact and cheaper than aT1 and AH-705