Still need to align the origin axes for the skates' trucks, and I think I might add heel cup and toe cap seams, but here are test renders of the rollerskates.  The boots are conforming, the toe poms are smart props, and the skates are composite props.  The skates' truck are articulated to facilitate poses with the foot tilted side-side (such as in a turn), and the wheels rotate for animation.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5