RailCore® Labs
RailCore® is a family of Core-XY based Reprap 3D printers designed by J. Steve White, Tony Akens, and Ben Withem.
Fans
For Radial fans for layer cooling, an upgrade from the one in the BOM is the Delta fan model BFB0524HH - they put out a lot of air, and are quieter as well. A nice high quality fan.