ive never used featherlite but alumilite has varies cure time resins. the typical alumilite cures in like 10 minutes. just look at thier site they have all the info.
im sure it was trying to set if your pouring a multi-piece swimbait in one shot. i can almost gaurantee you thats why your sections are not coming out with any consistancy. if i were you i would make a two piece mold of each section, properly vent it, and see where that gets you.
from my experience the more steps you skip trying to make the process faster, the more likely your going to mess something up