Joongwon used the Hasegawa F-15E kit (Idolmaster boxing) along with BAM Models’ F-15 ACTIVE conversion set, Caracal’s 48205 decal sheet and a few additional aftermarket sets to improve kit detail in specific areas (cockpit, ladder, wheels notably)
You can follow Joongwon’s amazing work on his Youtube channel (Dancing Brush79), well worth checking out!