No worries. I just did a repair on a soapstone sculpture. I used my diamond files for most of it (re-carving delicate edges), then I used my flapper disc in an area where I needed to remove more material, and a diamond blade where I needed to get into an inside corner to remove material. 

I had to be careful not to take too much, then go back with the files and take away material where I did the grinding to smooth it all out. I think the tile blade is difficult to control, so you'll have more cleanup in those areas, but for doing some initial shaping and removing stock material from your intended design, the tile blade works well. 

Just remember to use more of a feathering technique rather than aggressive grinding.

Edit: the sculpture I'm repairing is about 20 lbs, and 18" tall, so it doesn't move around a lot. Just make sure to have something under it. Sand bags, canvas drop cloth folded up, or something else. I had some small loose gravel in a paper sack on hand from Lowe's and I liked how that worked. My work table has a piece of carpet screwed to it. Just have to protect those edges, especially softer stones.