Hi Mick.
First sorry I never got round to doing a write up, I have since had to remove a sensor from a nano members front OS as his speed MPH was not working, I had to drill out the sensor if this as to be done it must be carefully approached as to not damage the hub ring, I do have photo of both the rear and front
ABS I did but I need to find time to add it to the forum.
Anyways nice to hear you got it sorted, there is always a
T4 at the nano meets should any member like to attend one all are welcome.
If all is ok and the
ABS is as it should be I would refrain from changing the sensors at the moment, case of if it is not broken do not fix, once again if the sensor did not just pull out with the rear your would have to remove the hub and tap it out, then clean inside the sensor hole so the other new sensor fitted properly.