Pure speculation on my part, but I think it stays with you. The
PES status is more of a centralized CMPB grading, whereas the MO in
your unit would only be concerned with your FFI status.
"PES BP" refers only to type of BMT training, right? Then you'll
probably be grouped together with the PES B people, but with the
qualiffer "P" to reflect your former status. My situation was
roughly similar in the mid-80s: I was overweight in Tekong &
graded as "Cat C1" (or was it PES C1?), then got posted to combat
side & even attached out for Brunei jungle-training before ORD.
I never shook out off the "C1" label during NS, even when I was
running sub-9 minute SOC timings.