by raimundo » 24 Apr 2004 8:25
the idea is to move the rake very quickly under the pins, with the points up, the pins are raised over the points and dropped off into the wide valleys, and thus have a place where there is little obstruction to them finding their own place. I doubt that commercial bogota rakes work well because of the finish, they should be sanded very smooth. wrap a piece of 400 grit 3m wet or dri sandpaper around a wooden chopstick and and use this to get rid of all that rough edge, and round out the square edges to make this pick really move with little friction.
To see what is happening, take the core out of a cylinder, and move and manouver the pic in the keyway of this core and watch those bottom pins dance around and flirt with the shear line. it dosen't seem to matter what the pinning is.