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The Dapol track cleaner as received. This will operate on DCC by plugging in a decoder. 
It was having severe current collection problems, so I soldered on additional current collectors onto the bogie pick up strips. This improved matters a little, but the thing which improved it the most was polishing the blackened wheel treads. Current collection is now excellent. As supplied, the collection method is frankly pathetic. 
Above is the unit fitted with the vacuum cleaner attachment. This is very effective, as can be seen in the picture below. 
Above is seen the abrasive disc which was used first and it removed a lot of dirt. Next the unit was run with cleaning fluid which seeps through the foam pad onto the rails, then the polishing head further cleans the rails. 
The pads are fitted with a very soft spring which keeps the pad in coantact with the rails but does not exert too much pressure. 
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