Here is a section of the plans showing the balance point, which is at the fuselage side. It sounds like it's a bit on the heavy side. There are others here flying Deceptions. I'm sure they'll chime in with good starting points for the throws. But, low rate ballpark figures would be something like: 3/16" to 1/4" both ways for ailerons; 3/8" to 1/2" each way for elevator; and 1 1/2" or more for rudder.

David