To fill the cupcakes with lime curd (I put mine in a piping bag) gently angle your knife and cut a circle out of the middle of the cupcake. Take the center out (it will look like a cone), cut off the bottom, leaving just the top. Fill the cupcake with lime curd and place the top back on the cupcake.
The Sport Trac was a Class 2 vehicle with a GVWR of 6250 lbs. and a maximum GCWR of 12,000 lbs. This made it one of the more and the then most capable mid-size pickups, having a greater GVWR and GCWR than the Dodge Dakota, GM's GMC Canyon/Chevrolet Colorado pickups and Toyota Tacoma.
The Ultraweight in USATF has only two specifications, namely its minimum weight, and the distance between the inside of the grip and the top of the weight, which is a maximum of 15.24 cm. See USATF Rule 195 for the various weight specifications which vary from 12 lb. to 300 lb.