I bought a Gan 356 M Lite, and regret not getting the full version that has the extra springs. Now I want to try to make it tighter, but can't justify buying a whole new cube. If anyone has these laying around unneeded, and are willing to sell that would be amazing! I've found a couple places, but they use flat rate shipping, which is twice the price of the item. Willing to pay around $15 Canadian shipped for the set of 3. If I'm wrong about the version of springs I need, please tell me!