Try this one out:
<a href="ftp://www.electrocution.com/pub/users/electroc/206cg.xls" target="_blank">ftp://www.electrocution.com/pub/users/electroc/206cg.xls</a>
This one shows the lat CG and also changes the sg of the fuel according to OAT - it even calculates the fuel's own changing arms, but does not recognise 75 US gals - it was too near to 76 US Gals to make a difference anyway.
cheers
phil