Have you used these servo thingys

[MicroMan]

If you did was it worth the $8 and change?
http://www.readyheli.com/Custom_Heli_Parts_Carbon_Fiber_Servo_Arms_p/chp_servoarms.htm

[OICU812]

They give a much straighter shot to the swash balls than the standard horns you would use on the 9650 or the 3421. Mine work fine without those arms, but several swear that it takes away any interaction. Lorents and Will are using them and last I remember they both felt they were really worh it indeed. I am sure they will tell you otherwise if I am mistaken. I have a set in my room, I am going to install them on one of my machines to compare for myself as well.

[Lorents]

Yeah, I use them on my Logo 14. As Shawn sais it makes it possible to make the arms straight without using subtrim. Another neat thing is that by mounting the arms on the inside of the aileron servos and the outside of the elevator servo it will give pretty straight links from the servos to the swash. They also have this macho appearance that we like on our Logos :D

[MicroMan]

Thanks for the scoop on these servo arms they look interesting but I may skip em.