Thanks Major
The metal tabs that ride the axles for power pick-up.
I've bent them in a little for a "tighter" fit to the axle.
Would a little white grease help on the contact area or would no significant results be achieved?
I seem to be able to achieve minimal sparking or none for 20 minutes or so, then the wheel spark begins to return.
With the same attention to each engine tender some seem much less resistant to sparking than others. Curious.
Thanks
Soo Line