MODEL-01E - Bellwhisker Jerboa reference-view cut (ART-MON-053 cell col 2 row 2, 614x384 px)
Per view: share of the drawing / largest connected part share of the crop / aspect (w/h)

Before (MODEL-01C rule): valley cuts at x=461 and x=106 (106 = the thin tail just before its tuft;
the tail tapers into a deeper valley than the real side/front junction at ~300)
  side  0.06 / 1.00 / 1.55   <- tail tuft only
  front 0.66 / 0.53 / 1.47   <- side body + front view
  top   0.28 / 0.98 / 0.53
  boxes: side (33-105), front (114-444), top (426-587)

After (STUB rule: a valley cut that leaves on one side < 10 % of the drawing which is >= 90 % one part lying mostly
across the cut is skipped): cuts at x=461 and x~300
  side  0.41 / 1.00 / 1.25
  front 0.31 / 0.98 / 0.64
  top   0.28 / 0.98 / 0.53
  boxes: side (25-300), front (300-444), top (426-587)

Valley-cut survey of all 20 sheet cells (smaller side's share of the drawing, before the fix):
  real view boundaries 0.204-0.453 (beetle, fox, wolf, gecko x2, viper, scarab, tortoise, hyena, pangolin, jerboa 461)
  jerboa tail cut 0.057 (only one below STUB 0.1). Viper and hyena valleys also cut one shadow-joined part (64 % / 70 %
  across) but hold 23 % / 22 % of the drawing, so they stay.

--check over all 40 requests after the fix: min share 0.19, min largest-part share 0.98, aspect 0.23-1.60, 0 flagged.
--check on the jerboa with STUB = 0 (old behaviour): flagged "side: 6% of the drawing", "front: largest part 53%".