Scott asked for crate based comparison of MIP peak position vs. raw slopes .

I selected 100 consecutive BPRS tiles, in 2 groups, from each of the 4 crates. The crate with systematic lower gain is the 4th (PSD-20E). 

The same spectra from pp 2008 fmsslow events are used as for all items in the Drupal page.

Fig 1. BPRS carte=PSD-1W

Fig 2. BPRS carte=PSD-19W

Fig 3. BPRS carte=PSD-1E

Fig 4. BPRS carte=PSD-20E This one has lower MIP peak