Definetly get hold a spare sear set if you can find any, i also second the airsoft enginuity hop set over the maple leaf one , ive had both and seem to have more luck with the fixed hop. as RDB said dont lose the torch plug or thats it gone forever!!!!!! Spare hammers and springs come up time to time from kwa themselves in the US. Everything else should last pretty well. TTake it apart learn how everything works its a very finnicky trigger set if it isnt all absolutley perfect youll have issues, but they arent too complicated to fix when they do go down
Also would reccoment getting a Gen 2 Style trigger from Rhesus which converts it to a normal style trigger which feels nicer to shoot. (also adds the benifit of being able to tune the trigger pull.)
Other than that look after it and enjoy it