diff --git a/REBUILD.md b/REBUILD.md
index 4bffec3..ee9b026 100644
--- a/REBUILD.md
+++ b/REBUILD.md
@@ -257,7 +257,9 @@ group's ranges posted in the window `capture`: planned ones not started at
 fill, which takes capture ranges in priority order, done ones too (they're
 fetched again, corpus only), and skips those complete (`ranges.stored_at`,
 set when it sees the range.json). A year of every group is the data to
-replay voyager 3's 30-day blocks on.
+replay voyager 3's 30-day blocks on: marked 2026-10-25, 2016 (priority 0,
+30B articles, ~0.56 TB) and 2021 (priority 1, 87B, ~1.6 TB); a recent year
+is ~200B articles, ~3.6 TB.
 
 ## Phase 2