diff --git a/crates/aldabra-core/src/plutus_cost_models.rs b/crates/aldabra-core/src/plutus_cost_models.rs
index 36a5b17..ed8c4e2 100644
--- a/crates/aldabra-core/src/plutus_cost_models.rs
+++ b/crates/aldabra-core/src/plutus_cost_models.rs
@@ -52,3 +52,27 @@ pub const PLUTUS_V3_COST_MODEL_PREPROD: [i64; 297] = [
     107490, 3298, 1, 106057, 655, 1, 1964219, 24520,
     3,
 ];
+pub const PLUTUS_V2_COST_MODEL_PREPROD: [i64; 175] = [
+    100788, 420, 1, 1, 1000, 173, 0, 1,
+    1000, 59957, 4, 1, 11183, 32, 201305, 8356,
+    4, 16000, 100, 16000, 100, 16000, 100, 16000,
+    100, 16000, 100, 16000, 100, 100, 100, 16000,
+    100, 94375, 32, 132994, 32, 61462, 4, 72010,
+    178, 0, 1, 22151, 32, 91189, 769, 4,
+    2, 85848, 228465, 122, 0, 1, 1, 1000,
+    42921, 4, 2, 24548, 29498, 38, 1, 898148,
+    27279, 1, 51775, 558, 1, 39184, 1000, 60594,
+    1, 141895, 32, 83150, 32, 15299, 32, 76049,
+    1, 13169, 4, 22100, 10, 28999, 74, 1,
+    28999, 74, 1, 43285, 552, 1, 44749, 541,
+    1, 33852, 32, 68246, 32, 72362, 32, 7243,
+    32, 7391, 32, 11546, 32, 85848, 228465, 122,
+    0, 1, 1, 90434, 519, 0, 1, 74433,
+    32, 85848, 228465, 122, 0, 1, 1, 85848,
+    228465, 122, 0, 1, 1, 955506, 213312, 0,
+    2, 270652, 22588, 4, 1457325, 64566, 4, 20467,
+    1, 4, 0, 141992, 32, 100788, 420, 1,
+    1, 81663, 32, 59498, 32, 20142, 32, 24588,
+    32, 20744, 32, 25933, 32, 24623, 32, 43053543,
+    10, 53384111, 14333, 10, 43574283, 26308, 10,
+];
diff --git a/crates/aldabra-core/src/plutus_mint.rs b/crates/aldabra-core/src/plutus_mint.rs
index d9def8c..682e404 100644
--- a/crates/aldabra-core/src/plutus_mint.rs
+++ b/crates/aldabra-core/src/plutus_mint.rs
@@ -586,11 +586,28 @@ fn prepare_plutus_mint(
             .fee(fee)
             .network_id(network_id);
 
-        // PlutusV3 needs cost-model in script_data_hash. (Mirror of the
-        // PLUTUS-4 fix in plutus.rs::build_signed_plutus_spend.)
-        if let Some(cost_model) = params.plutus_v3_cost_model.as_deref() {
-            if matches!(args.policy_version, PlutusVersion::V3) {
-                staging = staging.language_view(kind, cost_model.to_vec());
+        // Plutus V1/V2/V3 each need their cost-model wired via
+        // language_view so pallas computes script_data_hash on the tx
+        // body. Without it, chain rejects with PPViewHashesDontMatch.
+        // Caught 2026-05-07 attempting Agora's V2 GST-policy bootstrap
+        // mint on preprod — earlier code only set language_view for
+        // V3 and every V2 mint hit the chain rejection.
+        match args.policy_version {
+            PlutusVersion::V2 => {
+                staging = staging.language_view(
+                    kind,
+                    crate::plutus_cost_models::PLUTUS_V2_COST_MODEL_PREPROD.to_vec(),
+                );
+            }
+            PlutusVersion::V3 => {
+                if let Some(cost_model) = params.plutus_v3_cost_model.as_deref() {
+                    staging = staging.language_view(kind, cost_model.to_vec());
+                }
+            }
+            PlutusVersion::V1 => {
+                // V1 cost model not yet provided in aldabra-core. If a
+                // V1 mint is ever needed, append PLUTUS_V1_COST_MODEL_PREPROD
+                // to plutus_cost_models.rs and add the matching arm here.
             }
         }
 
diff --git a/crates/aldabra-dao/examples/dump_governor.rs b/crates/aldabra-dao/examples/dump_governor.rs
new file mode 100644
index 0000000..5fddf62
--- /dev/null
+++ b/crates/aldabra-dao/examples/dump_governor.rs
@@ -0,0 +1,46 @@
+//! Dump a sample GovernorDatum as PlutusData CBOR hex.
+//!
+//! Used during preprod DAO bringup (2026-05-07) to construct the
+//! inline datum for the governor bootstrap tx. Edit the values in
+//! `main()` to your DAO's parameters and run:
+//!
+//! ```sh
+//! cargo run --example dump_governor -p aldabra-dao --release
+//! ```
+//!
+//! Pipe the output hex into `wallet_plutus_mint_unsigned`'s
+//! `dest_inline_datum_cbor_hex` arg.
+
+use aldabra_dao::agora::proposal::{ProposalThresholds, ProposalTimingConfig};
+use aldabra_dao::agora::GovernorDatum;
+use pallas_codec::minicbor;
+
+fn main() {
+    let g = GovernorDatum {
+        proposal_thresholds: ProposalThresholds {
+            execute: 50,
+            create: 100,
+            to_voting: 100,
+            vote: 1,
+            cosign: 1,
+        },
+        next_proposal_id: 0,
+        proposal_timings: ProposalTimingConfig {
+            // Short timings for preprod testing — flip these up for
+            // any real DAO on mainnet (Sulkta uses 7d/7d/48h/24h/1h/30min).
+            draft_time: 60_000,
+            voting_time: 60_000,
+            locking_time: 30_000,
+            executing_time: 30_000,
+            min_stake_voting_time: 60_000,
+            voting_time_range_max_width: 30_000,
+        },
+        create_proposal_time_range_max_width: 30_000,
+        maximum_created_proposals_per_stake: 20,
+    };
+    let pd = g.to_plutus_data().expect("encode GovernorDatum");
+    let mut buf = Vec::new();
+    minicbor::encode(&pd, &mut buf).expect("encode CBOR");
+    let hex: String = buf.iter().map(|b| format!("{:02x}", b)).collect();
+    println!("{}", hex);
+}