This board came with the smoke and sound upgrade set - so it is a smoke board.

After I'd changed the connectors I tried it on low load (motors only, no tracks) and it worked fine. Then I put the tracks on and I had smoke not only from the smoker but also from the board - note the blobby solder on the right hand chip in the second photo. A copybook case of early life failure! That left me with power to only one track.

The board is being replaced by Mato, who have been very understanding about it.

I wondered if anyone else had the same problem - the mosfets are only a couple of dollars (providing you are OK to resolder surface mount components) but I don't want to go there if it's taken anything else with it.

Yes it is a Pershing - the non S&S version bought last year - hence the upgrade. It already has metal tracks, I'm also fitting the VS airsoft gun and a brass barrel.

Jo