Edge - I can understand the confusion when theres no solid explanation published by the manufacturer. And if i had a GN made in melb that came with S stamped into it id probably like to assume that must mean Stuart made it too. Dunno about I and J but again, if consecutive years as you say likely confirms its a code for when a bat was made rather than who made it. Itd be a shame if finding out who made your bat (of the local handmade stuff) wasn't as simple as checking for a particular manufactures stamp but I can't say im overly concerned whether mine was made by Stuart or the work-experience kid. The bat is what it is....