The disk is a good product and was well priced. Delivery was over 2 weeks, which is acceptable considering it was shipped from China. However, the web site was Fiido UK and boasted UK stocks, so pretty poor overall.
The disk was for a rear wheel on a D11 and required disconnection of the motor cable from the control box. Okay, except for the fact that the cable feed to the control box passes through a small hole which is not large enough for the cable plugs. I had to cut a larger hole in the plastic control box to get the cables out. Not well thought through at the assembly planning stage at the factory.
I have to do a similar disk replacement on an L3 next, I do hope that it won't be so awkward.