Hi, as I've made my DIY rudder based on MMjoy2 here is what i know :
1- I've placed magnet on the M10 stainless bolt- it works fine.
2- My accuracy on placing magnet is within 0.5 mm.
3- I've used heat shrink tube with glue when placing magnet on the end of the bolt - so when I heated up the tube it shrinked all way around, placing magnet at the center.
Diagram show my magnet mount.
http://simhq.com/forum/tmp/4797.png

Attached Files Rysunek1.png
Last edited by Czary; 10/04/17 12:37 PM.