I have a friend that has some....he's pleased with them FWIW.
xjet said:The next-cheapest digital I've found is the Hitec HS5475 which seems about the same speed but is a little stronger at 76oz-in -- albeit at an extra $15 per unit.quote]
I talked with Mike from Hitec......he seems a little gun shy of the 5475s for a very rigorous application. My decuctions are that the gear train (same as the 475s) may be getting a little stressed at the higher torque levels. Thats just my deductions not a quote from him. I think on a .40 sized plane though they would work great.