Is any one able to advise on how to tighten the tube on my Dark Motor please?

I noticed it moves 1 degree or so slightly to the left (when facing it directly it front) which isn't much, but seems to be affecting the 19.2e channels.

I think this is causing a slight misalignment for me, as slightly pushing the dish on the right hand side when behind it locks in the 11817v tp for me
 
Is any one able to advise on how to tighten the tube on my Dark Motor please?

I noticed it moves 1 degree or so slightly to the left (when facing it directly it front) which isn't much, but seems to be affecting the 19.2e channels.

I think this is causing a slight misalignment for me, as slightly pushing the dish on the right hand side when behind it locks in the 11817v tp for me
Look on the motor body there should be plugged hole sometimes a do not reove lable.

Pop out the grommet and youll see a adjustment screw.
 
Quick update to close this one out properly:

I did end up taking the dish back off, marking the motor tube/arm with tape and re-centering/re-aligning the 1m dish, so there was definitely some mechanical work involved along the way.

The thing that really changed the direction of the troubleshooting was testing with the Viark. On the same dish/motor setup it could scan and receive Astra 1 Service 1–5 on 11817 V, move away to other satellites and then return to 19.2E with the services still working. That made it look less like a straightforward alignment issue and more like something odd was happening on the VU+.

I then restored an older OpenATV backup from 9 August. Astra 1 Service 1 came back immediately, and I repeatedly tested moves from 19.2E to 0.8W, 7W, 16E and 42E and back again. 11817 reacquired every time.

I updated that restored image, rebuilt the Unicable tuner setup and retested it, and everything is still working normally.

So the final picture seems to be that the dish did benefit from being properly re-centred, but the disappearing 11817 issue itself was tied to something strange in the later VU+/OpenATV configuration/state rather than the motor being unable to return accurately.

Everything is now working again, so I’m calling this one solved. Thanks to everyone who helped along the way :) ❤️
 
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