Mike:
You can save quite a bit of weight by replacing your 2000 pack with maybe a 930 li-po pack. I did some tests on my e-plane with 5 digital servos ( 2-9411 2-3421 1-8411) and was replacing about 35mah per 8 min flight from my radio pack. This is vs 200-250mah for a 10 min flight on my glow plane. I can routinely fly 4 flights on my electric Genesis and when I recharge the pack put in about 140mah. the vibration is just not there anymore to make the servos work hard and draw lots of power.