Help with F405WSE in a Hee wing t1 vtol

Hi folks,

I question regarding my elevator servo.
From the ongoing build, never as easy as expected, I’ve been converting the t1 to VTOL using a Matek F405WSE FC. Cutting a long story short my elevator wont work due I think to it being in the same group (2) as a dshot motor.
Servo/pwm Config
M1
M2
M3
Ele
tlit left servo
tilt right servo
aileron
aileron.
I only have 8 servo outputs. I have moved it to servo 8 and swapped with an aileron, now that does work. Switch off dshot and all servo work but hovers as twitchy as anything. Other than putting both ailerons on 1 servo anyone got any ideas.
Much appreciated.
Nick