You are more than welcome to use the Mark 1 that was stolen from me on Oahu about 4 yrs ago - if you see it, that is. Size 5 (fits 5"10 to 6' or so), light grey deck, white hull, deep seat.
As for your spec ski, they're still great skis and will go well in the bumps. The seat height will determine its stability, some are low, others high. Better to have a spec ski than nothing at all.