The fastest minirig devices need a significantly smaller starting sleep time.
diff --git a/driver-bitforce.c b/driver-bitforce.c
index c1f10b5..9389026 100644
--- a/driver-bitforce.c
+++ b/driver-bitforce.c
@@ -20,7 +20,7 @@
#include "fpgautils.h"
#include "miner.h"
-#define BITFORCE_SLEEP_MS 666
+#define BITFORCE_SLEEP_MS 500
#define BITFORCE_TIMEOUT_MS 7000
#define BITFORCE_LONG_TIMEOUT_MS 15000
#define BITFORCE_CHECK_INTERVAL_MS 10