Camera shifting in focus tube

[Sabalias]

I hope someone out there can provide a bit of advice.  I’m a bit concerned about my DSLR connection to my Skywatcher Explorer 150PDS.  I’ve got the adaptive ring for the Canon and it screws onto an extension tube which then slides into the focus tube. However the extension tube/focus tube connection seems to loosen quite easily and there seems to be a risk that it may completely fall out of the focus tube.   

Is there a better way of attaching the camera rather than using the screws in the focus tube?

Many thanks,

Stu

Edited June 17, 2021 by Sabalias

[Almac]

Hi Stu

i knocked this bracket up for the same reason

[Almac]

[Almac]

Slot cut in so I can move focus tube in and out but it doesn’t really show up in phot

[Almac]

Shot showing slot for focus 

[alacant]

Hi

This is a step closer to holding the extension tube/camera assembly securely.

You may want to drill and thread for a third screw in the existing collar and see if that improves stability first.

@Almac 's method looks like the definitive solution though.

HTH