I posted a bit of a rant on the Dell quickfit slides on the a techtarget side the other day, and you were kind enough give this link. If you are interested I have a report that analyses the Dell Quickfit rails and there variation from the SSI standard. To be honest it looks like a genuine mistake on their part. If you are interested in a copy let me know. It should help make sure that you are covered with your client if you have the same problem again.

I have a feeling that being a late-night install that the folks on-site weren’t thinking clearly, and were perhaps trying to mount the rails on the wrong side of the posts? Either that or some proprietary Dell rail design wasn’t mating well to the standard cage-nut post. I’ll find out for sure tomorrow I guess.

I’m stumped as well as to why your customer’s hardware won’t fit, unless it has some sort of oversize rack adapter plates bolted to it, but I would think that if that were the case, it would be blindingly obvious to your people in the datacenter. Good luck with getting that sussed.