ImgBurn showed about 80% used with all 15 tracks.
ImgBurn won't let me burn to these particular discs slower than 16x (16x, 24x, 32x, 48x are my options).
I'm going to try exporting these files to .wav format, play them, and if they sound OK, I'll try to burn another disc.
Shee! I haven't been this nervous about anything since I had a drive crash on me one time long ago
If I wasn't so short on discs, it wouldn't matter so much.
Thanks... will get back to ya...