hi lads, brain picking time again! have a few hornby 55's that i will be using power for the sulzer. i stuck a hornby saphire chip into it and it went mad! she runs fine at normal speed but when crawling it will stop then tear off like a bat out of hell then stops then starts the same crap all over again:mad: whats the best chip to use - for slow speeds espically? thanks as always, seamus