diff --git a/controlsave.pike b/controlsave.pike
new file mode 100644
index 0000000..3257c28
--- /dev/null
+++ b/controlsave.pike
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+/* Run this script to upgrade a new save game to a New Game Plus with the unique mods loaded
+Some useful weapon GIDs:
+
+Weapon Mod Exquisite Eternal Fire 100
+Unmistakable :)
+0x20a48983004a0054n
+
+Weapon Mod Exquisite DLC2 Shotgun specific Impact Cannon -100
+Probably Single-Track whatever, the Shatter unique
+0x4e50def20e48054n
+
+Weapon Mod Exquisite DLC2 RL specific Folded Space 500
+Should be the projectile speed boost
+0x2256ef6508184054n
+
+Weapon Mod Exquisite DLC2 Railgun specific Snap Charge -100
+Custodial Readiness
+0x2d353346ebf84054n
+
+Weapon Mod Exquisite DLC2 SMG specific Devastator 100
+Spam Mail?
+0x89c1f77ecf18054n
+
+Player Mod Exquisite Fleet Foot 50
+Possibly health on evade?
+0x22a72842ade64054n
+
+Weapon Mod Legendary Damage eg 46, 48, 60
+Should be a basic damage mod at high rarity
+0x322e985e6b2bc054n
+
+Weapon Mod Exquisite Specific Missile Blast Radius 98
+Might not be a unique
+0xf56a66e21fcc054n
+*/
+
+/* Structure of one inventory item:
+4 Version (always four)
+8 GID
+4 Parameter (float)
+4 Overcharge Normalized Value (always zero)
+8 PID <== this one seems to be essential
+4 Qty
+*/
+constant label = ([
+	//Lifted from https://reg2k.github.io/control-save-editor-beta/
+	542507875: "GLOBAL_VARIABLE_MANAGER",
+	897885379: "MISSION_MANAGER",
+	948665365: "LOOT_DROP",
+	1019016931: "VENDOR",
+	1721202367: "PLAYER_PROPERTIES",
+	2134335914: "EXPEDITION_MANAGER",
+	2227510435: "TRIALS",
+	2500542964: "TUTORIAL_MANAGER",
+	3357797087: "OUTFIT",
+	3388499232: "INVENTORY",
+	4156221793: "ENCOUNTER_DIRECTOR",
+]);
+int main(int argc, array(string) argv) {
+	string data = Stdio.read_file(argv[1]);
+	if (!data) exit(1, "USAGE: pike %s filename\n", argv[0]);
+	sscanf(data, "%-8c%-4c%-4H%c%-4c%-4c%s", int version, int crc, string filename, int scope, int unknown, int nchunks, data);
+	werror("%x %O\n", crc, filename);
+	werror("Calculated CRC: %x\n", Crypto.Checksum.crc32(sprintf("%-4H%c%-4c%-4c%s", filename, scope, unknown, nchunks, data)));
+	array chunks = ({ });
+	for (int i = 0; i < nchunks; ++i) {
+		sscanf(data, "%-4c%-4c%-4H%s", int uidlow, int uid, string chunk, data);
+		werror("Chunk: %s (%d bytes, %d left)\n", label[uid] || "???", sizeof(chunk), sizeof(data));
+		chunks += ({({uidlow, uid, chunk})});
+	}
+	//TODO: Make edits to the chunks, possibly including adding to inventory
+	//TODO: Save back to a file and make it ready to load!
+}