i decided, back in april, to mod my little reprap for dual extrusion which commenced 4 months of component swaps, rebuilds and material calibration, all so i could print sensors eventually. the time was not wasted and now i can reliably print sensors that actually work (although i am still printing the nylon a little bit too hot)
one side note is that although the f-electric filament will print “onto” the nylon, it doesnt actually bond with it so sensors will have to be printed on PLA and then attached to the nylon forms, rather than integrated.