This is a project made in November, 2011.
The aim of the riser blocks is to increase the lathe swing over bed, in order to increase turning capacity, or to attach some accessories. Although there are commercial block sets, these are my homemade version.
The blocks are 20 mm thick, so the locking bolt secures the headstock column in the secondary groove.
Iíve seen riser blocks made in aluminum, with CNC router; I guess it would be possible to make them with 3-D printing.