The Kiwi Super Flyer is and super easy to install on any Kiwi. The kit includes everything from the maiden bar up, so you only need to undo one bolt when you want to swap from the standard to the Super Flyer. It has a huge 27mm (1⅛”) orifice and free-flow yarn guides on a sliding hook flyer and  includes 3 super-size bobbins which have a 500gm capacity, so less time changing bobbins and more yarn on the bobbin. Will fit Kiwi 1, 2 and 3.