when you spin the wheel , does it see the rpm eaily, or does it take some high rpm before it reads. mine seems to have a delay reading it , then jumps to a high rpm. and is that the magnet in the hole. or is it inset similar to a heli?

so I will focus on this and not disassemble anything until the rpm is ruled out.

could I buy a new nut?
have you replaced the magnet yourself?


THANK YOU for the help.