I piped a compressor discharge to an oil cooler (a small cup containing drain water from freezer and a copper coiled discharge line submerged), then to the oil port on the compressor, and finally out of the other oil port to the condenser to return through the suction line. Compressor dome stayed cool to the touch as the suction line. This drastically eliminated any waxing problems with in a cap tube system and allowed the compressor to run cooler.. Any suggestions as to why this isn't a normal hook up in manufacture literature?