[Mick1 (Mick)]

I've tried to attach 2 pictures to show there are no screws, grub screws or roll pins holding the focus knobs to the spindle but the upload fails, And yes I'm following the instructions on how to upload files.
I've spoken to the retailer where i purchased the motor from they were trying to help me but they have not come across this before.They did suggest I purchase a 10:1 focuser and put the motor on that,which I am contemplating
doing if I can't get any joy from other sources first.
I will speak to Sky Watcher Australia first thing Monday to see what they have to say. I've watched the You tube clips on how to fit these motors, Ive spoken to the guys at Astro Anarchy where I purchased the OTA and the guy I was talking to was looking at the 120 mm (the next one up from mine) which has the same focus knobs, he was at a loss as to how the knobs are secured to the focus spindle, and was not able to shed any light on the situation.
As I said in the first post there are no screws around the central boss of the focus knob, Ive removed the rubber grips/rings and there are no grub screws threaded down from the outside.
And yes Raymo I agree everything I've seen on these, they have securing screws of some sort that need to be removed to attach the motor drive,very peculiar.