Thank you for the education Stig!
So the cheaper magnet plugs should checked (pull on the magnet? ) to make sure the magnet doesn’t detach.
And the donut magnet is put onto the oil filter (if your bike has one!) which is a great solution as theres no way for it to break away. Just hope the seal isn’t compromised?
Maybe goldplugs are worth the extra $$??
Sometimes you get a deal, and sometimes you get what you paid for!
Cranky