CS, Those are actually FS-501. Must be old stuff as years ago there was some site that mis-labeled that D/D as FS-502 and I ended up with that on some things. You should swap them out and put FS-501 on the label to correct that. FS-502 is assigned to RPM-016. Glad you're having fun with the box! I need to send you a porcupine quill to clean up some of those other RPMs at bit. Next time.























