Gearbox top cover

[Patrick Baize <speedracre@netzero.net>]

all
    I'm working on my 72 Spitfire transmission.  I've taken the top
cover off.   There are 3 bars in it , with the gear selecting arms.  I
need to disassemble these parts from the aluminum top housing cover.
I've looked at my old books, but  none give a description on how this is
done.

    Has anybody done this? If so, can you give me some insight on this?

TIA
Pat 63 Spitfire( disassembled parts increasing in number)

http://www.netzero.net/download/index.html