Gyro help plz

[Sentinel1537]

I'm new to 3D so when i set me 6102 up in 3D mode and took it to feild i took up to a good hover and hit it to check if it was ok for 3D. all was fine but it started to turn left after about two fights of flips i've made all the adjustments i can in radio. i can probl trim it out but i thought u wasn't suppost to. any info would be nice thx....Venture 50 G500t with 810 G tail servo Update I think i figured it out i needed to adj the servo arm in heading hold to 90 degrees then adj tail linkage until there was a 4.5 mm gap in the tail output shaft. there must be 4.5 mm between tail casing and tail ***. works much better. Just in case someone else has this prob