ORIGINAL: daven
Then give the Expert SL 451 servos a shot. They center better and cost about the same as the 225's. I still can't tell the difference between a 451 and JR 3121.
I'm pretty happy with my Hitec 225's (for 424) but just went to order some Expert 451's for a new model and found Horizon no longer lists them[
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Perhaps the JR Sport MN48's are a replacement but they have been on backorder for several months...so my new Hurrikane will have JR 3121's.