For a DLE with electronics ignition you can either use an opto kill switch that's controlled by your tx, or you can use any slide switch mounted right next to a servo where the arm moves the switch to kill it. As for the ign pack, a 4.8 or 6.0 volt NIMH is good, or if you use lipo you need a regulator set up. NIMH is easier and works great. I fly mine for a solid weekend with no prob. What plane do you want to use it on?