Almost everyone has a piece or two of some Bogen or Manfrotto gear. It’s decently built stuff with an affordable price tag. The problem is that 3-digit Manfrotto numbers are now being used for products which used to have Bogen 4-digit numbers. This can cause a lot of confusion when you need to order a new part, or a few additional matching pieces. Well, PhotoNotes.com has a nice conversion chart that seems pretty comprehensive, though perhaps a bit dated. If that page vanishes, I’ve copied it as a pdf on my IEBA web site.