Not sure if this is the right place for this….if not,moderators please move!!….l recently purchased a part built “DART” ,from Station Road Steam,which came with a pair of machined cylinders,however,whilst they are the correct PATTERN they are actually far too big for my 7.25 chassis,l suspect that they are for a 10.25″ size engine,but l dont know of any 10.25″ class14xx locos,so l am wondering if anyone can shed some light on these cylinders before l list them in the classifieds???,thanks,jack.