hey @WhiskyWalker , sorry that I totaly forgot about your request from the DIY gimbal thread. So here it is
bearings are from ebay
I am using at this moment electronics directly from COBRA M5 joystick. It has MaRS / M-Force = Magneto Resistive Sensors coupled with neodymium magnets.
Here is some picture from VKB for ilustration :
https://defender-global.com/catalog/joysticks-2/cobra-m5-usb-hall-sensor-4-axes-12buttons
But I am under impression that this COBRA M5 main board electronic is not that robust ( firmware or something ) so I am thinking about replacement. There are several options. As mentioned combination of MaRS sensor boards and MS Sidewinder main board or using hall sensor and pcb from TM T16k joy. And last but not least is the option to get in touch with @troll 
Or here some alternative approach from @haukka81
Will see which way will I choose …