I am going to install a Spektrum DX7 system in my Yak54 25%. how do I plug in the two servos for the elevator without a servo reverser? Also I am using MG high torque servos and want to use 6volt battery for the extra torque. What would be a good choice of battery.

I'm not overly familier with the DX7, I would think you may have to use a reverser. I feel NiCADs are a better choice for the flight pack. NiCADS can take more abuse. 6 volt flight pack batteries are available for Horizon, I would guess they are avaliable from Tower or other discounters, if not from your local Hobby Shop.

G'day Mate,
You don't need a reverser or a "Y" lead, follow the directions here, to mix for duel elevators,
http://www.rcaerobats.net/Spektrum/dx_7_main_page.htm
Follow the direction carefully, & you will have perfectly set up elevators.

Thanks for the help!!! It was just the info I needed