A method for forming, at an end of an existing multifiber ribbon cable having an initial first core-to-core spacing, a multifiber ribbon cable segment having an enlarged second core-to-core spacing, comprising: (a) providing a system comprising: a chassis; an enclosure within the chassis; a mold mounted on top of the chassis, a reservoir and pumping system mounted on top of the mold for holding a flowable, light-curable material and injecting the light-curable material into the mold; and a curing light source mounted into the enclosure; wherein the mold is formed from a material that is transparent to the curing light and is positioned such that light-curable material injected into the mold is exposed to light from the curing light source; wherein the mold comprises a base and a lid that, when in a closed configuration, define an internal cavity comprising a plurality of individual fiber channels corresponding to individual fibers of the existing multifiber ribbon cable with the initial first core-to-core spacing, wherein the plurality of individual fiber channels has a spacing equal to that of the second enlarged core-to-core spacing, wherein each individual fiber channel passes through the internal cavity, wherein each individual fiber channel extends between a respective entrance at a first end of the mold to a respective exit at a second end of the mold; wherein the assembled mold further includes an injection system for receiving the light-curable, flowable material from the reservoir and pumping system and feeding it into the internal cavity, and at least one vent for allowing air to escape from the internal cavity as the light-curable, flowable material is fed into the internal cavity; (b) placing the mold into a closed configuration; (c) stripping an end portion of the existing multifiber ribbon cable to bare glass, separating the end portion of the existing multifiber ribbon cable into individual fibers, and cleaning them; (d) threading the individual fibers through respective channels in the mold; (e) injecting the curable material into the chamber; (f) using the curing light to cure the flowable material; and (g) opening the mold and remove the ribbonized fiber. (a) providing a system comprising: a chassis; an enclosure within the chassis; a mold mounted on top of the chassis, a reservoir and pumping system mounted on top of the mold for holding a flowable, light-curable material and injecting the light-curable material into the mold; and a curing light source mounted into the enclosure; wherein the mold is formed from a material that is transparent to the curing light and is positioned such that light-curable material injected into the mold is exposed to light from the curing light source; wherein the mold comprises a base and a lid that, when in a closed configuration, define an internal cavity comprising a plurality of individual fiber channels corresponding to individual fibers of the existing multifiber ribbon cable with the initial first core-to-core spacing, wherein the plurality of individual fiber channels has a spacing equal to that of the second enlarged core-to-core spacing, wherein each individual fiber channel passes through the internal cavity, wherein each individual fiber channel extends between a respective entrance at a first end of the mold to a respective exit at a second end of the mold; wherein the assembled mold further includes an injection system for receiving the light-curable, flowable material from the reservoir and pumping system and feeding it into the internal cavity, and at least one vent for allowing air to escape from the internal cavity as the light-curable, flowable material is fed into the internal cavity; a chassis; an enclosure within the chassis; a mold mounted on top of the chassis, a reservoir and pumping system mounted on top of the mold for holding a flowable, light-curable material and injecting the light-curable material into the mold; and a curing light source mounted into the enclosure; wherein the mold is formed from a material that is transparent to the curing light and is positioned such that light-curable material injected into the mold is exposed to light from the curing light source; wherein the mold comprises a base and a lid that, when in a closed configuration, define an internal cavity comprising a plurality of individual fiber channels corresponding to individual fibers of the existing multifiber ribbon cable with the initial first core-to-core spacing, wherein the plurality of individual fiber channels has a spacing equal to that of the second enlarged core-to-core spacing, wherein each individual fiber channel passes through the internal cavity, wherein each individual fiber channel extends between a respective entrance at a first end of the mold to a respective exit at a second end of the mold; wherein the assembled mold further includes an injection system for receiving the light-curable, flowable material from the reservoir and pumping system and feeding it into the internal cavity, and at least one vent for allowing air to escape from the internal cavity as the light-curable, flowable material is fed into the internal cavity; (b) placing the mold into a closed configuration; (c) stripping an end portion of the existing multifiber ribbon cable to bare glass, separating the end portion of the existing multifiber ribbon cable into individual fibers, and cleaning them; (d) threading the individual fibers through respective channels in the mold; (e) injecting the curable material into the chamber; (f) using the curing light to cure the flowable material; and (g) opening the mold and remove the ribbonized fiber.