For recurrences of the event, I really would consider making Helix components Bound to Legacy. Or just let us purchase all the possible Gree weapons regardless of class. Repeating event or not, it seems like the smart thing to do.
Am I reading this right? You can only buy the weapons you class can use? Like I can't buy the saberstaff on my Jug to send to my Sin? If so that really sucks.