I am still working on how to send you pictures from my I pad and/or from my email address.
In the mean time I removed the front 4 wheels and the back 4 wheels from the engine and it still sparks so now I know it has to be coming from the rollers, roller arms.
The sparks are not coming from the outer rails. So I do not think the engine wheels (that have been cleaned) are the problem causing sparks.