I have the Austin Healey Spares gear set in my BN7, purchased probably four years ago. Lempert's weren't available at that time. I had the ring and pinion fitted to a spare rear end given me by a member of our club, St. Johns Austin Healey Club, Jacksonville, FL. The gears were assembled by Gear Works in Clearwater, FL. Took a bit of nagging and they replaced only the seals, not the bearings. This assembly was installed in my car at a club tech session--several members have lifts--and is absolutely silent in running. I think the change was well worth the money if you actually intend to drive the car, and I do that regularly.