I'm having some problems and I just can't figure it out, hopefully someone else can.

The plane is a Sig Cap 231EX w/Saito 1.80 & MA 18x6. Ail & Ele servos are GWS ST03's, rudder is High-Torque Tower Hobbies (Futabas essentially) and throttle is an Airtronics 94102. Initial CG set to 4-1/2", ele at 1" low rates, ail at 3/4" and rudder at 3" for low rates.

First flight the plane took off and I flew it around. Trimmed it at WOT and it seemed to climb when I chopped the throttle. Thought it needed upthrust. On landing the plane seemed to be tail heavy. I add a start coming in and seems like it goes from 10° nose down to just a click on the stick and now it's balooning up 10'. Took it home and added a little up thrust last night and pulled out about 20% of the elevator.

Second flight was today, I took off and flew around for a few. Plane still twichy and it seemed like I couldn't get it to track straight (more on this later). I was nervous so I didn't do much other than an inverted spin (boy did if flatten out with a little aileron!). Anyhow decide to land it and on first attempt same thing, come in nice and I had to give some down elevator to get it to come in. Got it leveled and next thing it baloons up 10'. Well, scratch this attempt and go around and try again. Same thing. I'm only at 20% throttle or so and didn't make any changes to power during or before the balooning. Third try I run outta fuel on approach so I pretty much have to make it and even though it balooned (w/NO power) I managed to get it down on this attempt in one piece.

I talked to several others at the field looking for suggestions and maybe see if someone could fly it for me, no luck on the flying but I did get some advice. Everyone seemed to think it was tail heavy so I moved my battery from the back to the front which put the CG around 4" back from LE. Most were surpised by looking at the long chord thinking 4-1/2" wouldn't be too bad but we left it at 4".

Third flight I took off and the plane was squirely again. Coulnd't get it to track staright, stay level, etc. Maybe my nerves where shot as soon as I took off I started messing with trims trying to get it level and seemd trim it left (ail), make a turn and now I need right trim. Elevator was the same. I tell the fellas next to me training that I'm having trouble and bringing her in, they clear out and I prepare to ditch it near the runway. managed to bring it but tail porposies a tad but I mange to get it in one piece without nosing over.

Well I'm now stumped, Plane isn't tail heavy by the numbers. My next train of thought is that it's not an engine thrust situation, but these cheap GWS servos aren't holding center and have a poor resolution so that I can't get them dead center anyways. What are your thoughts? Is this something possible or should I move CG even further forward? Would it be bad to try some 94102's I have (65oz/in at 6.0v I think) just to see or is that not enough? I could keep throws to a minimum and use a mechanical advantage to keep their work load down. Any help is appreicated and if anyone lives near New Port Richey Florida with time to burn I'd love to let you take a stab at it.

- Joe