Mine is buried in a pile of boxes, but it was minor, I just tinkered with the mounting a little to make it grip the Scotchbrite pad. I also added a series diode for the motor and also a TVS to suppress any spikes from the brushes.Can you show us a pic of your modified cleaning pad.
They actually work pretty well with the Scotchbrite, with the original system, it was too messy for me.Are these units effective at cleaning track?
Now that makes sense! I'm thinking if it would work, my Erie 610 would not be concerned about a few sparks.The Pulmore motor has some pretty lively sparks at times at the brushes. When I'm pulling it around with a $1500 Legacy locomotive, I don't want the generated voltage transients to kill that one.
There's scientific evidence that isopropyl alcohol, while good at cleaning track, is poor at keeping track clean. There's an article in this MRH issue that explains the chemistry (just page through until you see "What causes the "Black Gunk" on wheels and rails" and page to follow the article). The gist of it; non-polar solvents work best at keeping track clean by inhibiting the micro-arcing that causes the black soot buildup on track. Alcohol's high dielctric constant places it low on the list.I also use the scotchbrite pads held on with double sided tape. Works OK but nothing beats a wholly sock and some alcohol.