ORIGINAL: sfari_dave
I did what you described and it's better. It does not spin left anymore. Now it spins right. The trim and 4-1 adjustments are useless to stop it. It will fly and we've gotten good at flying it and making it not spin, but it would be so nice to have it hover without touching it for once.
Even with the best setup, it will never hover hands off for very long without some tail movement. As the battery wears, and the motors heat up, the trim has to be pushed to the right slowly. This means that even if you get it to hover hands off, about 4-10 secs is the longest you're going to go before the tail starts to creep in one direction. That's just how these things are.
As I understand it, tho.. you say that it constantly spins in one direction, regardless of the 4 in 1 adjustment, and the trim on the TX, correct? This is not normal. You should be able to get it to hold the tail steady for several seconds before having to move the trim. Especially when you first start flying with a new batt and cool motors...
If it now spins the other direction, and you can't tune it out, then maybe the other rotor/pinion has the same problem??? If so, repeat the procedure on it...
Also, if the 4 in 1 adjustments seem to do nothing, it is possible that the pot on the 4 in 1 has been broken by being turned too far, etc. If this is the case, then you would have to replace it. If the pot can turn around in one direction forever without stopping, this is likely the case.