Gerry, I just installed the new V7 chip in my BLI E7. It is really quite an improvement. Slow speed is great, notching and transition make the new chip well worth the wait. Thanks. I have a Proto 2000 GP9 that from new sounded as if it has a turbo as it has a very distinct whine. Nothing like the E7 or other first generation EMD's I have. Have any ideas ? Also when the V7 chip comes out for the GP9 will it have the "whine" ? Thanks, Rick.