I am so eagerly waiting to here more on this, I run 2 Duet3s with bltouch, and I am running out of spare tips 
Best posts made by DeadNewbie
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RE: New Z Sensor?posted in General Discussion
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RE: Scanning Sensor Mount for a Roto with Toolboardposted in Duet Hardware and wiring
Hi Thanks for replying, yes its a Moulded cable, found the issue though.
in my school boy error moment when I killed my first Roto Board, I also killed my super pinda and roto 3 wire fan.
it looks like during the initialisation M950/M106 because the tach output from the fan was dead it gave the error, a replacement fan arrives this morning so I will be able to confirm it later.
all in all its was a very costly error.
regards