Don, I am using standard (3001's) on everything except the rudder, where I'm using a 3050 digital just because I had it. I think the analog 3010 would have enough torque as well for the rudder. But I am running 6 volts (Lipo and a regulator), so I am able to use the full practical servo range (EPA's at 115%) for good resolution and still have adequate speed and better centering.

Charlie, it is possible to set this plane up with a 4 channel radio, but setting up dual elevator servos is going to be a challenge, so you might want to use one elevator servo with a split pushrod. In that case I think you could get away with a 3004 on each aileron, but you would definitely need two 3010's, one for the rudder and one for the elevator. If you use one 3004 for both elevator halves, or a 3004 on the rudder, your Venus will not be around for long. Figure out the balance by installing the engine, cowl, prop, spinner, throttle servo, fuel tank and landing gear first, then temporarily secure the receiver and battery with Velcro and lay the elevator and rudder servos on the horizontal stab to get a ballpark estimate. With the O.S. 1.20 4S (30.5 oz with muffler!), I mounted 3 servos in the tail and have the receiver and battery far back (I added a little battery shelf at the fuse former near the wing bolt receivers), yet still had to add 2 oz of lead to the tail to get the CG where I wanted it. The 1.20 AX w/muffler is not much lighter (29.9 oz) than the 4-stroker so you might expect a similar set-up.