After a coil Yoke mount breaking when out detecting with my NOX, that seems to be a common fault with the coils, I decided to make my own yoke stiffeners to prevent this occurring again. One that fits the 11 & 15 inch coils and one for the 6 inch coil.
I have also made a version for anyone who has a broken yoke already that uses 2 cable ties to fix the repair plate in place. To fit simple disassemble the coil from the steam and put the repair plate in place, and secure around the the coil body with 2 x 5 mm cable ties. Reassemble the coil back onto the shaft placing the broken yoke tab in place to get the right spacing.
If you do not use the stiffeners as a preemptive measure you might want to just have the repair version at hand to get you out of trouble.
Added a file for a 10mm extra long 8mm cross bolt to compensate for the extra thick yoke side cheeks if required.
For the bolt I used 0.2 hot end and set in cura to Super Quality profile 100% fill and supports touching build plate.
If you do not want to print it or do not have a 3D printer you can get them from here
Standard with number 4 nozzle
I used have used as low as 20% fill and seems ok but to make it stronger I recommend to increase the fill density to 100%, also used supports touching build plate option.
Printing this way will give stronger rigidity to the side ears.
Cross bolt print orientation.