Closers Day Weapon cores should have tuning stats.
After watching the eme stream I realized that the 1 day duration weapons that we get for Closers Day, the first of every month, should have perfect S rank tuning stats.
Speaking from experience. The 1-Day +13 Crater core that I got on the 1st had substantially worse stats than my +13 Super core. Which is saying a lot since my Super core has semi bad tuning stats.
On all of the +13 weapons that we did get they had a majority of D rank tunings. Probably 90% D rank.
while you're at it should give the 1-day Dark Command set perfect stats too