I've never ever had a KLC F-100 out of trim yet either the 101 or 103 conf, the only problem I've had is over weight.
With regard to where you put the bags, I've always filled the front first, I know some of my collegues fill the back but if you put most of your bags forward I seem to get an Ideal trim of between MAC 18.0 and 21.0 which is what they req, I know in the DH mask in Codeco it says aim at Mac 20.0 but the crews say anything between 18.0 and 21.0 is the Ideal trim
We use Codeco!
CHEERS!!!!