Transmission and guiding of fast (500 and 1000 eV) electrons through an insulating PET nanocapillary foil has been studied. These measurements extend our earlier results to negative angles (opposite of the positive angles previously done), giving a reduction in the transmitted intensities and a different dependence on the sample tilt angle with respect to the electron beam. Later measurements for 500 eV using the same sample show substantially reduced transmitted intensities for positive angles. Energy losses associated with the transmitted electrons occur for all spectra, indicating inelastic collisions with the capillary walls before being transmitted or lost within the foil. These results are contrary to those for slow highly charged ions for several samples for which energy loss was not observed. Despite considerable energy losses, significant numbers of these relatively fast electrons are found to be transmitted through the foil. The asymmetry in the spectra suggests a change in the properties of the sample during the measurements, which is attributed primarily to the long period of bombardment by the intense electron beam.