[cycleguy55]

I received the adapter today from Summit. It appears both O-rings are oversize - the O.D. of both is larger than the groove into which it's supposed to fit. I was able to work them in, but I'm concerned one (or both) may pop out when I'm installing it.

I have an assortment of O-rings which are all slightly larger in cross-section than the ones supplied with the adapter, and I'll be able to find one to fit under the flange of the mounting nut, so that's covered. The one against the block is of greatest concern as it could easily slip out of the groove during installation and not be noticed.

The adapter also arrived with a couple of small dents and scratches on the machined surfaces, probably because the parts were all loose in the box - no paper or padding to separate them.

Overall rating, pre-installation:
o Product: 8/10
o Packaging: 5/10

Will update further once it's installed.