Oh so downgrading is necessary afterall.You can manually downgrade your mset, just launch gateway mode on sysnand then install mset_usa.cia (from the gateway site) with devmenu.3ds.
I can't use devmen.3ds because the 3DS is at my gf's place and she has no Gateway card or Cubic Ninja for Pasta CFW.
Is there an alternative way to downgrade? I keep reading about you guys using mset from 6.x, 7.x, 8.x. Why would I need to downgrade?