Rackmount rails that actually fit the SC846 chassis

I’ve got a SC846E26-R1200B and the recommended rails are MCP-290-00057-0N.

Trouble is, when you get these rails and rackmount the server, you can’t pull it out far enough to take the top lid off. You have the loosen the rails and pull them further than they’re supposed to go, in order to fully remove the lid.

The MCP-290-00053-0N rails actually fit and allow you to fully extend the server in a standard rack, and get the top off.