very surface i.e. 33, which you are trying to match up with 3 surfaces in a single list. Which is the second issue you would need to graft the single list of surfaces before inputing them to both the P and C inputs. That way you are making GH Match the first surface with the first set of points and so on. and not every surface with each set of points.
To sort out the Data structure coming from the grid use a pathmapper with {A;B;C;D}(i) --> {A;B}…
Added by Danny Boyes at 4:11am on February 7, 2011
First use a series component with start=1, step=42, count=3
Use the output to create a new series component with start=existingseries, step=1, count=11