Doubled Footed Mendel Vertex

A Mendel vertex with a foot that is twice as long as the usual one. This, used with a double top vertex, gives the X Carriage and resident extruder more headroom. It is used in the http://reprap.org/wiki/Rroofl design.
A Mendel vertex with a foot that is twice as long as the usual one. This, used with a double top vertex, gives the X Carriage and resident extruder more headroom. It is used in the http://reprap.org/wiki/Rroofl design.