I would like to start off with thanking Paul for the design that inspired this over at http://www.thingiverse.com/thing:1102612 .
These are smaller and fit nicely on the 2020 extrusion. Also please note these are designed for the FolgerTech Kossel 2020 Rev B, as the holes are made for perfect placement without needing to be slid in the extrusion. Made for M3 screws and nylok nuts which are encased within the print. Also, these are designed to fit the Everbilt 3/8"Dia. 51/64"L springs I got in an assortment pack from Home Depot.
YOU NEED TO PAUSE THE PRINT MANUALLY TO PLACE IN THE NUTS
Designed to snugly fit 5.4mm wide nylok nuts with some vertical play.
FolgerTech Kossel 2020 RevB