Hi all! First post! Im in the process of building stands for and hopefully refinishing. Now to my understanding the FB im the serial means that the wood is fir? The B stands for black as far as I understand. Does this mean it was one with poor veneer? Or would it be solid? Possible to sand and refinish? I've read a lot of the posts already on here but just want to double check before I ruin a set of speakers . Thanks in advance!