I did replace the brushroll to the Activator as it's original one had shot brushroll bearings and the bristles were a bit worn too. As you can see this Activator has static edge cleaning brushes unlike the original brushroll that had revolving edge cleaning brushes.
The bag light still doesn't work, I couldn't fix it, I think the bulb has burnt out. I have both videos of the Purepower and Dual Purpose, it will be uploaded tomorrow.
The bulbs in the bag full lights are LED's and they last 1000's of hours - there must be a fault in the bag light circuit - have you tested the bag light sensor for continuity when a vacuum is applied to it? Have you checked the continuity of the wiring loom? have you checked the circuit board for dry solder joints? Alex - I am very surprised that you couldn't fix it - knowing how thorough you normally are with your Hoovers. Have you got a multi-meter to check the continuity of the circuit?
Alex, Your videos may be long but they don't really seem that long when watching. I always enjoy how explanative you are, plus it's neat for me to see some of the innards of vacuums from other countries, plus how they work, etc.