Hey I have a question about the Strengthening and them costing 0 which to me looks like it implies that once you upgrade your equipment to Ningendo, If you ARE NOT lvl 105, you lose the ability to gain strengthening stat boosts for coins, once you've upgraded. Regarding your example does that mean that you wont be able to gain any strengthening boost between 104 and 105. And if so wouldn't it make sense that because of this, people should get to 105 before they upgrade to Ningendo equipment so they can get the most out of their strengthening boosts? Please clarify for me if you can ?

You dont lose the ability it is a bug with the display, it still costs coins to upgrade as usual, but the interface shows 0 instead of the actual cost