You may want to review your magnet choice; (temps as low as 200 F; lose magnet properties )

*Neodymium magnets are sensitive to temperature change and even lose magnet
properties at high temperature
*Neodymium magnets lose -0.09 ~ -0.13% of Br/°C  and can work stably under
80°C for low Hci Neodymium magnets and 150°C for high Hci Neodymium magnets.

http://www.armsmag.com/neodymium.htm

brian gochnauer

An argument for putting it on the nose of the e-shaft
instead of the damper plate.

Paul Lamar