diff --git a/game/reconstructed/powersub.cpp b/game/reconstructed/powersub.cpp
index ae8ca76..82a66dc 100644
--- a/game/reconstructed/powersub.cpp
+++ b/game/reconstructed/powersub.cpp
@@ -367,8 +367,18 @@ void
 	// (file-static one-shot, NOT an instance member: the PoweredSubsystem layout
 	// is byte-locked by PoweredSubsystemLayoutCheck -- adding a field would
 	// break sizeof and every offset assert downstream.)
+	// BT_POWER_DETACH_TEST=1 detaches the FIRST powered subsystem to tick;
+	// BT_POWER_DETACH_TEST=<name> targets one by name (e.g. PPC_1, ERSLaser_1),
+	// which is what proves the failover on a WEAPON rather than on Avionics.
+	// Pair it with BT_BTNTEST=0x1a,<press>,<release> to switch GeneratorA off
+	// mid-mission through its real RIO button: the hunt must then re-attach the
+	// subsystem to a DIFFERENT generator, which is the case players actually hit
+	// (their generator dies) and the one a same-generator re-attach never tests.
 	static int s_detachTestDone = 0;
-	if (getenv("BT_POWER_DETACH_TEST") && !s_detachTestDone)
+	const char *detach_want = getenv("BT_POWER_DETACH_TEST");
+	if (detach_want != 0 && !s_detachTestDone
+		&& (detach_want[0] == '\0' || detach_want[1] == '\0'		// "1" / empty = first one
+			|| (GetName() != 0 && strcmp(GetName(), detach_want) == 0)))
 	{
 		s_detachTestDone = 1;
 		DEBUG_STREAM << "[power] TEST: detaching " << GetName()