I noticed my various batteries weren't making contact with the coil despite pulling up on the battery terminal.
I noticed the coil was slightly below flush with the adaptor. Took the coil out and dremeled the threaded collar down about 1mm. Now it makes for a much more reliable connection, no matter what battery or replacement coil is used.

I noticed the coil was slightly below flush with the adaptor. Took the coil out and dremeled the threaded collar down about 1mm. Now it makes for a much more reliable connection, no matter what battery or replacement coil is used.

Last edited: