I had the Venus 40 which was powered by a Saito 72 and some time later with a Saito 82 (Both will fly it with enough power), after assembling I noted that it came nose heavy and I relocated the battery to the back of the servos compartment (at the headrest of the cabin but inside the fuse), servos were located as indicated in the manual, after several flights I decided to add some weight to the tail (About 1 oz of lead). The plane had a bad crash and I just do not want to repair it by now, even that it was a great flier and a good practicing bed for pattern maneuvers.
If I had to assemble a new one I definitively would use again the Saito 82 and put two miniservos at the real to control the elevator halves, leaving only one standard ball bearing servo to control the rudder and one micro servo to control the throttle at the servo bay.