I rotated the speedo magnet 90 and put about 4-5 across it through the middle
Reasoning is that it closed the flux circuit so I might get better saturation?
And I’m guaranteed not to accidentally make both poles the same polarity which may not drag the needle cup quite as well.
But you can’t really cause any permanent damage so your way will provide a good data point
I suspect it should work too because the field at the rare earth magnet surface is so strong anyway
Keep us posted
-s