I wish I could just put this to rest.
Stepup is full sidewall. Construction is called deckwall, its a maple core and sidewall sandwiched between a veneer above and below. The sidewall extends tip to tail. the core extends tip to tail. the veneers extend tip to tail.
IMHO best park ski made. Longest length is a 181, which measures long (about a centimeter shorter than the 184 chronics)