Posted for "Zavatson, Christopher J \(US SSA\)" <Christopher.Zavatson@baesystems.com>:

 <<Seems like a lot work that is never mentioned in the manual.  Was hoping
not to do that but I guess I have too>>
 Bryan,
 The dimensional stability makes this worth the effort.  You really don't want
compliant material sandwiched in a bolted joint.  I didn't install the
stainless sheet until the entire firewall layout was complete.  Everything was
mounted on spacers during construction.  Once everything firewall forward had
a home, the engine mount and all accessories were removed and the spacers
located in the fiberfrax.  see attached
 Chris Zavatson
 N91CZ
 360std
 www.N91CZ.com
 
[Actually, if you go to the LML website and click on the "engines, prop, and cowling" link in the menu you'll find Chris's firewall prep pictures right near the top of the link list.   <Marv>   ]