Two years ago I bought three KO2413 servos...
I tried to use one of them on my Yokomo BD, but experienced that it was noisy, gritty and simply not going to neutral each time I was steering.
I noticed that the case was not closed (screws were not tightened...).
I checked the others (just took a look) and ... surprise! not a screw tightened!
On the web I found that it was a well known problem....
I claimed with the shop that sold them to me....
The shop owner claimed with KO....
Last year he went to the Nurnberg Toy Fair (Spielwarenmesse) and he claimed again with the guys from KO.... they simply said that the problem doesn't exist....
Well, last saturday
I went to Nurnberg ... to the Toy Fair... and claimed with the guys from KO... they smiled and said that the problem doesn't exist... they also said that I'd eventually claim with the shop that sold them to me. etc etc...
One thing is sure....
MY SERVOS ARE K.O.


