Upgrades include everything you need to add a new size to your wheel base:
A head (attaches into the base of your wheel) A flyer (has a back with whorls, arms, and an orifice bar and holds the bobbin) A hook orifice bar (attaches to the flyer magnetically) A bobbin (slides onto the flyer and is secured to the back with a magnet) GOLDEN WHORL
If you have a MACH III, Echo, or Firefly with a corian (silver) or wooden whorl - you can update your wheel by purchasing an Upgrade from your Dealer.
Please note, the following wheel models cannot be upgraded at this time: Hopper, King Bee, Queen Bee.
The Pollywog & Worker Bee already have Golden Whorl engineering (no need to upgrade!)
WHAT IS THE DIFFERENCE?
CORIAN (SILVER) WHORLS have ratios from about 1:4 to 1:20 (exact range varies per wheel model). GOLDEN WHORLS have the same ratio range as silver whorls + fast ratios between 1:25 to 1:60 (exact range varies per wheel model) for spinners who want to explore the limits of superfine spinning. GOLDEN WHORLS have less flyer drag to make spinning short-staple fibers (like cotton) effortless. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The MACH III is our heaviest wheel, weighing 25 pounds (over 30 pounds if you have a 32 oz setup full of yarn) so bringing it to vending events and classes can be a drag without this travel accessory. Tie the strap around the handle for extra length (if necessary for your height) and attach the wheels to the base with the included screws (4 per wheel). There are pre-drilled holes in the MACH base for this accessory.
****Wheels and Straps are included in the MACH Package. *****