I've now put about 30 miles on our 1969 911e, but there's quite a bit of vibration from 2k-3k. I've isolated it to the unobtanium transmission mount...which looks ok, but when removed and the tranny is supported w/ a jack, the buzz goes away.

So...I guess I'm wondering if I have the right combination and orientation of washers?

chassis, large washer cup upwards, mount, large washer cup downwards, bolt.

Should there be some smaller washers in there as well, to keep the large washers from creating a solid mount?

If there isn't...I might just put some in there and try it.

Per