Wired remote control for a BenQ SP831 Projector

Recently we needed to control a digital projector outside of the IR range of its remote. The projector and remote were both capable of connecting via a cable, but no documentation was provided on how to do so. This is what we discovered in testing: - The plug required is 2.5mm TRS (stereo). TS did not work. - Though TRS is required, only two conductors (RS) are used. - The jack on the remote is recessed far enough that the housing of most 2.5mm plugs we tried prevented them from being plugged in. We eventually found a mobile phone headset cable that fit. Its hairlike wires required soldering with painstaking precision. Due to using pre-installed and unused cable, our finished product was as follows: Custom-built 2.5mm TRS to RCA adapter -> 50' of RCA cable -> RCA to XLR adapter -> 200' of XLR cable -> custom-built XLR to 2.5mm TRS adapter. This project would have been significantly simpler if the remote (a) did not have a recessed jack and (b) accepted a TS cable (which would be compatible with TRS). Since only two conductors are used, it's pointless to design a jack that demands a three-conductor plug. Update: We discovered that the remote inexplicably stops working if it is plugged in for an indeterminate amount of time. So, we unplug the remote when it is not in use.