There are two versions of the MST ’07 Buffered Multiple. The original version is in 7HP. The newest version is in 8HP. They both function exactly the same, but the new version is a little easier to build. You can easily tell which version you have by the number of PCBs: the original version (7HP) has two, the new version (8HP) has one.
8HP Buff Mult BOM:
7HP Buff Mult BOM (original version):