The model

Twelve instruments, all bounded.

Every instrument carries a weight, and no weight is fixed. Verification moves them — at most 0.15 per model run, never outside the bounds set when the instrument was written.

Instrument panel
run
no instruments reported

bar = current weight inside its hard bounds · tick = the value it opened with

Model runs

Each run is a revision made after verification. Nothing moves until forecasts have been marked.

No weight has moved yet — and none should.
The first revision waits on the first verified forecasts.