With all the issues we have about lack of storage, etc. Why not change the way event items work. Instead of having a separate ie Endless Handwrap for levels 4,8, 12, 16, 20, 24, 28, 32.....make the items "Flexible". So that when you upgrade the item from say level 4 to level 8, you can still use that same item at level 4 with level 4 stats and then when you are level 8, it upgrades itself. It could be made to take far more materials to upgrade and even maybe btc for the convenience but, dear God...so many items just to have them for all the levels that you might want them for.