Only things that spring to mind are some seperate supplies (other then the PRS sets) of the TiNi wrist pins and some sets of wrist pin clips, as a lot of guys like to change the pin and clips when they throw a new rod in. Couple of spare cooling heads and some turbo buttons in case of the odd stripped plug thread. That should do it I reckon. Best wishes for success in your new venture. It should be a no brainer, as the GO's sell themselves