The double brackets shown below were bent from narrow strips using the Mini bender and the Boss (lower right) is another of my developments.
Basically it is a dual purpose Ø5/16" rod socket which can have either a 3/32" Ø 4.1mm or threaded bore. It is fitted with an 8 B.A. grub screw.
Threaded versions can also be made for the 8 B.A. Micro rod system.
The top left (Long) Fork end is shown fitted with the removable boss/rod socket.
The top right is a short narrow double angle bracket which can be used traditionally or fitted with the boss.
The lower long fork end is fitted with
a permanent version of the boss. This one has a Meccano axle size hole
in the socket.
Scale - Full size
DIY Details and drawings can be supplied