Hey Dgiatr,
Here is an update on our throttle creeping issue. I swapped out the throttle servos and used the hextronic hxt12. Mainly because I had them in my box. No other reason. After re-setting all the other settings - high/low and sync point - I ended up with this result.
At any more than 50% throttle the servos would hold station no problem. Great news. I can fly around and not worry about the power falling off. Now - below 50% - the power would drop down to the sync point over about 2 minutes. Originally, I had my sync point set at 2500 revs. I changed this to 3500 revs. Now when it pulls the power back it will stop at the sycn point and hold there. This power setting will still allow me to land with power and have the sync engaged. I have done 10 flights with these new settings and it is all working flawlessly. I know others have said in earlier posts that 3004 servos will be fine but it would appear that more powerful servos will ensure that it all works properly.
I hope my findings will aid in your setup and help get it sorted.
Regards from,
The Kiwi Bandit.