http://www.afewchase.com/Spear-Jackson/3.jpg

   Good closeup D!!!
See what I meant??
Somebody tightened this one up with a driver whose notch was cut too 
wide and all they could grab were the ends of the slot.
Doesn't look like the blade fit the slot very good either.

  But if you ground a proper driver for this saw, I bet you could still 
tighten it up considerable.

  Obviously you can't take the nuts off unless you at first dressed off 
the protruding, and now peined, screw ends.
   I would try to avoid taking them off anyway, but I bet they'd snug up 
some.
  yours Scott

-- 
*******************************
    Scott Grandstaff
    Box 409 Happy Camp, Ca  96039
    scottg@s...
    http://www.snowcrest.net/kitty/sgrandstaff/
    http://www.snowcrest.net/kitty/hpages/index.html

------------------------------------------------------------------------