Cyclops: Watabe
Beast: Hayama genga
Storm: Watabe
Wolverine: Hayama L/O only, presumably finished by Chiba
last cut: Sushio

(Watabe doesn't have a source but I assume either from one of his gengashuu or just because it's obvious. Hayama sourced from his site, the link on atwiki is dead though. Sushio sourced by an insider)