[GreenKeys] Stunt Box help needed

[John, W9DDD]

Trying to add a sequence detector (long CDC).

Function bars and pawls seem to slide in with a little wiggling (high 
tech term there).
Although it doesn't appear that any rod actually goes through a hole in 
a function lever or spring plate, apparently the rod(s) do have to come 
out.  The question is which of the 3 that are retained by the plate on 
one end, (all?) need to come out. Is the wire from a coat hanger about 
the right size for threading in from the other end to keep every thing 
else from falling out?
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The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD