We developed a topology of OG-CNTFETs based on networks of carbon nanotubes in place of individual nanotubes. These robust transistors allowed us to study the behaviour of small assemblies of couple devices. We showed in particular that the global back-gate electrode can be used for multiple devices and that, by keeping the gate potential constant at all time, OG- CNTFETs can be used as 2-terminal like devices. The resistivity of each device within simple prototype circuits can be adjusted in a large range and then stored in a nonvolatile way using a global illumination step followed by local electrical pulses applied at the input electrodes of each device. OG-CNTFETs can thus be used to store synaptic weights and provide a rather good implementation of a synapstor. This approach noticeably allows compensating for the variability in the electrical performances of as-built devices. These results have been recently published in Advanced Materials [6]