The best way to cut a track is to cut through it in two places with a sharp knife and remove a copper section.
Caution!!! Use a good quality knife and don't press too hard to avoid breaking the blade.
Score many times instead of pressing hard. Keep your fingers out of the cutting path.

The metal plate is an optional piece that provides a solid backing for the breadboard. The BB830 and BB400 have 3M adhesive tape on the back to attach them to a surface. The metal plate can be used if you are not attaching the breadboard to anything. Just peel off the paper tape and stick the breadboard to the metal plate. You can use the breadboard as-is, but the tape is a bit soft and spongy and the thin paper covering can be punctured. The metal plate provides a more solid, permanent backing.

The BR1 and SB830 are very similar PCBs and excellent choices for making permanent prototypes from full-size breadboards.

The BR1 was our original design as a matching pattern Solderable PC BreadBoard to our BB830 Solderless BreadBoard. Over the years from excellent customer feedback we made some changes and developed the SB830.

The key differences of the SB830 from the BR1: