The items were donated to the raffle? Who wishes to venture how old those Hi Tech 300 servos? Back in 1985 Aristocraft (Polk Hobbies) Came out with the Model 720 (gold) and 610 (silver case) systems their claim to fame were dual conversion FM receivers and HS300 servos I bought 1set and my brother-in-law bought 1 of each. Well they worked as long as they were the only radios on, but as soon as another radio turned on no matter what channel nothing but glitches. My brother-in-law sent his in for repair twice and they were no better than before. The HS300 servos of the 12 two were DOA (dead on Arrival) and within 6 months 6 more would chatter so much they were useless, they ended up even being so unreliable to even use on throttle.