RE: Sites for gas setup advice.
I originally had my DLE55 powered Reactor set up with an rx switch/3600mah 6v nimh, and an ignition switch/1400mah 4.8v nimh. Went to this: [link=http://www.valleyviewrc.com/estore/electronics/kill-switches.html]RCEXL kill switch BEC's[/link]. I am using the 6.6v regulating version, though is sounds as if the newer DLE's don't need it, as they are rated up to 8.4v.
I am now using a single 3200mah LiFe pack, which took about 5-6oz's of weight out of the plane(battery/switch). I have used it now for around 60 flights; I set my timer at 15min for a flight. I have carefully monitored battery usage: with digital servos in the plane, and running the ignition as well, I average approx 4-500mah per flight, which gives me 4-6 flights with some margin. The TechAero IBEC is a very highly regarded version as well, for just a few dollars more...