Roborock S7 Max Ultra

The Roborock accessories-catalog main-brush listing we cited explicitly names "Qrevo, Qrevo MaxV, Qrevo S, Qrevo Pro, Qrevo Plus, Q7 Max, and S7 MaxV" -- this model isn't literally on that list (a "+" variant, a plain Q7/Q7+, Qrevo Edge/Slim, or "S7 Max Ultra" which is a DIFFERENT model from the listed "S7 MaxV"). We'd been extending the claim via the Q7/Qrevo family grouping rather than the source's own exact wording. Downgraded; may well still fit, just not confirmed from this source.

Previously cited us.roborock.com/collections/accessories as "authorized_retailer_confirmed" evidence, but a live re-check of that page found no washable filter product covering this model at all -- the citation did not actually support the claim. Downgraded rather than leave an unfounded citation in place. A genuine Roborock-brand filter listing does exist for Q7 Max/Q7 Max+/Qrevo Slim (see those models), but not for this one specifically.

Roborock's own accessories catalog lists a separate main brush product explicitly named for this model ("Main Brush for Qrevo, Qrevo MaxV, ... S7 Max Ultra"), and the Saros 10 product page separately links its own DuoDivide main brush listing ("Main Brush for Roborock Qrevo Curv Series, Qrevo Edge Series, Saros 10, Saros 10R and Qrevo S5V, Qrevo CurvX, Qrevo EdgeT, QX Revo Ultra, Qrevo Edge S5A, Qrevo Curv S5X, Qrevo Curv 2 Flow, Saros 20 Sonic, S10 MaxV Ultra"), which likewise doesn't name this model. Neither listing uses "only compatible with" or any other exclusive wording, and neither states a physical/mount difference between the two brushes — a separate official product existing isn't itself evidence this model can't also use the Saros 10 brush. Downgraded from not_compatible: absence from both lists isn't exclusion evidence.