Good morning, Rock.

I used the standard Airtronics because that's what I had on hand. The battery pack, well, what was what was on hand too. There is no question that higher current capabilities is better than lower for all the standard reasons. The six volt conversion is only if really needed. That is, the 4.8 volt packs are totally adequate.

I saw a Tiger 60 at the field last year, had an OS 90 four stroke on board and was a real performer. He had a Hitec mini in the engine compartment, (throttle servo) forward of the firewall, which sort of caught my eye. His drain tube was routed so that any excess oil went down and away so it would not collect in the engine compartment. And, what do you need a higher torque servo on the throttle for anyway, so I thought this was a good idea for such a setup. Additionally, it put a few grams of weight forward for better CG control. I needed some weight on mine to get the right CG, and that was with a Super Tigre 75.

I had a problem with my Tiger in that I was using Sullivan Goldenrods for control to the elevator and rudder. As the plane gained speed, I lost elevator authority. I originally thought it was a weak servo, or the wrong choice as the elevator servo. I had the same problem with the rudder, but it was less evident because I was still learning to fly (beyond solo that is) and the rudder was not used as extensively as it is now. Anyway, I found that the sullivan tubes were not 'anchored' properly so they actually flexed when I added elevator at higher speeds. I ended up removing the covering from the bottom of the fuselage to roughen the tubes then add epoxy to fix the tubes to the formers all the way from the radio compartment under the wing to the elevator. As it was, I had it anchored in two spots which, as I learned, was totally inadequate. The plane flew just great after the fix and the servos were just fine.

One more thing about the Hitec servos, as you said, they are inexpensive (read not cheap, but inexpensive) and do work fine. So, that's a great suggestion.

CGr.