These Brakes are being used on B50/51 PCPs too

See:
http://www.network54.com/Forum/113813/thread/1103836495/

Cheers,
Rich

"Nay, -- to crush your enemies, to see them fall at your feet --
to take their horses and goods and hear
the lamentation of their women. That is best."

From the book 'Genghis Khan: Emperor of All Men' by H. Lamb