looking online it seems my '17 GSA FD is PN 3374 8394 282. I don't need it ATM, but I have the opportunity to pick up a spare for cheap. always thought it'd be good to have one boxed up and ready to ship in case one of my trips goes sideways or a fellow traveller needs one. the pics of the used unit show a "8523952" stamped in the housing, I don't see any other numbers (that make sense) in the pics I have. Looking at parts diagrams even going back to pre-LC models I don't see that number anywhere. I do see a 852xxxx listed for a 2010. I'm not with my bike right now so I can't run out and compare the pics to my own. IDK if it came off a GS, GSA or RT, etc.. It is black, here's a picture with the number stamping. so how do you tell what FD you have just by looking at it so I can decide if it's compatible with my 17?