GPS & Data-loggers

Santa brought me a Power Flarm. I powered it up, converted my ICAO
address from 51201552 to HEX A5036A, Got a GPS lock-on after going
outside and everything seems to work as advertised. Of course, I won't
know for sure until I get close to another aircraft that is on a
collision course with me, will I ?
Some questions:
I have been running my trusty old Model 20 and a Garmin 100 driving
the SN-10, with the addition of Power Flarm, I now have 3 GPS's and 3
data-loggers. Question; Can the GPS signal from the Power Flarm be
used to drive the SN-10? If so, what is the wiring? Also, how do I up-
load and down-loan info into the Power Flarm? The manual doesn't get
around to discussing any of the above. My thought was to eliminate the
Garmin 100 and still have 2 Gps's and 3 data-loggers and save a few
mili-amps, which brings me to my last question; How much current does
this puppy draw?
Cheers,
JJ