Hi Yuki, no the IONs are not certified to DIN standards.
Hi Chris, Atomic only makes one liner per shell for this boot, labelled 25/25.5.
Hi Pete, yes it's possible! You needed to remount the heel pieces with the brakes underneath, drilling one more hole to secure them. You definitely want the 80mm brakes for a 78.
Hi Mariana, yes they do.
Hi Mariana, our Rotation 7s won't arrive until fall for us to verify, but I believe the toe pattern is the "Radical 2.0" while the heel pattern is the "Radical 1.0". In other words 42.5 x 58 and 32/36 x 52.5