ORIGINAL: Kerberos32
When I bought my Futaba 7C, it came with 3151 digital servos, so these are what went into my LT-40. I have just bought a Twist, and thought I'd get a flight pack with 3004 servos, put these in the LT-40 and swap the digitals into the Twist. Whats the benefit of digital servos? For an aircraft like the Twist would it be worth the time to swap the servos?
Digital servos in an LT-40 is a bit of overkill. So, if you're going to get new, less precise servos, go ahead with the swap. I use Futaba S3004 or Hitec HS-425 servos for most applications. I've got a few S3003 servos but since they don't have ball bearings, I usually only use those for the throttle channel.
I've yet to find a deal on a complete flight pack that can beat careful shopping for the individual components. The three receivers I use are Futaba R127DF, Hitec Electron 6, and Tower System 3000. The Tower receiver has been a good deal because it comes with a crystal. It used to be 7 channels, and from reports was identical to the R127DF. According to Tower it's now an 8 channel. I haven't heard who makes it.
When I know I'll be putting together a new plane, I start watching for sales at places like Tower, Servo City, Hobby People, and a few others.
Edit: Almost forgot, another reason I buy components instead of flight packs is so I can buy a stronger NiMH receiver pack instead of the nicads that come with many of the prepackaged receiver packs.