Just a few ideas…
this is a [size=150]monster servo bracket[/size] i have made using lexan parts from my OLD EH3r hexapod.
[size=75]“you may remember these jim”[/size] 
http://i531.photobucket.com/albums/dd355/innerbreed/100_0639.jpg
http://i531.photobucket.com/albums/dd355/innerbreed/100_0638.jpg
http://i531.photobucket.com/albums/dd355/innerbreed/100_0637.jpg
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Probably the hardest part is you can’t use a Y-cable on those servos because they go in opposite directions. You wind up using two channels and can set the 0 degree offset so they don’t fight each other. The problem is the electronics… both in the controller channels and in the servos will in general be slightly different due to tolerances. As you get further away from 0 degrees there will be more tendancy for them to fight s tolerances accumulate. Two servos bought from the same delivery might be very close, however two servos bought even a couple of months apart or from different vendors could be quite different.
this is true. and also what i would have expected 'if i had got as far as that.
one could still use a Y-cable as you could add a reversing switch to once of the servos.
but even that wouldnt level the tolerances of the servos! 
but having said this… its just an idea.
thanks for feedback tho.
this is a little over the edge perhaps but if you had to you could measure the angle displacement of each servo at the endpoints, pick the one with the shortest travel as your master, and write an equation scaling the value sent to the master by some amount to make the slave as close as possible. it’s a little over simplistic but it should be better than just letting them fight it out.
couldnt agree more!
