Reset Kits are limited, but you can actually reset any time for free. In the "Terminal Menus" where you can adjust your skill/gear sets there's a tab called "Customization Data" As long as you never save over these and leave at least one slot blank you can "load" them at anytime and you keep all your CP/SP points which you can then place however you like. Be warned if you save over a slot and select "remove customizations" the equipment will be removed but the stats you put on will be locked. You can however load a blank 1/1/1/1/1/1 stat file and save over an old one and make it a fresh slot again. If you use all 5 slots at once though reset kits are all you have left.