Subtract a paneling area with a surface/curve in Grasshopper?

Hello all,

I am trying to create a diagrid framework over a trimmed circular cylinder.  I have figured out how to get the diagrid pattern on the surface using the Paneling Tools plug-in (which I highly recommend!).  What I need to do now is subtract the cutout areas shown in images 1 and 2.  I have tried to use the trim with region/brep tools but I cant seem to make it work.  Would anyone be able to steer me in the right direction?

A second question for further down the line would be how to extract the curve geometry, not the faces that the paneling does, to then be able to use the pipe command to create the structure.

If anyone has any ideas for either issue thanks and please let me know.

-S