I was looking onj Vinyl Engine and was surprised to note that the SL D2 is actually lighter than the SL 1900, even though bit has slightly larger dimensions-the SL D2 is 6.9 kg vs 7.2 for the SL 1900. However the SL D3, which is fully automatic, as is the SL 1900, is 7.1 kg, which is closer, bit still lighter. The weight of the SL 1900 is due to the automaic mechanism, but it's surprising that it's heavier than even the D3. It is an earlier model and has slightly smaller dimensions. Is the SL D2/3 line the successor to the SL 1900? They are both servo and have a similar platter. If so, did Technics lower the quality or lighten the D2/3 models? How do they compare in terms of performance and quality?