Peirce,
This may sound snobby, or shallow, but the SG1d is no longer a contender. The sounds on todays pianos are greatly improved, the actions are more realistic, and the price & weight have both dropped. In it's day, many players loved that piece, as they did the Roland RD1000 - but c'mon ..... with all the advances available, there is no comparison. Your piano is certainly still useable, but it's an old dog now, and there are new pups on the block that can outrun that sucker without breaking a sweat.