Hi all just a quick update for anyone who finds this thread and is having the same problem as I am.
I ordered the following tool from Amazon:
Shop Bosch eBike Lock Ring Tool Spider Tool Active and Performance Engine Timing Tool. Free delivery and returns on all eligible orders.
www.amazon.co.uk
...only to find it doesn't fit either! The teeth look like they'd interface with the lockring but the spindle from the motor protrudes too far.
Could it be that I actually have a Gen 4 motor after all even though it says just Performance Line (and not Performance Line CX) on the casing? My bike is a 2020 Cube Acid Hybrid One 500.
Either way, I'll send this one back and I've emailed the company selling this tool to see if they can confirm it will work before I buy it:
This is the necessary tool to remove the Bosch spider. On the Active / Performance Bosch eBike systems.
www.e-bikeshop.co.uk
Hopefully it will be a case of third time lucky, getting rather annoyed at my shiny new bike that creaks like a whorehouse mattress! I'll update the thread when I find out either way.