Hi. I am helping my sister, who had a liquid mishap from her previous 2012 15" MB Pro. They removed the hard drive, and a store in California called Fryes sold her a sled. The HD plugs into the sled; it looks like it lines correctly, and you retrieve data using USB. The thing is, I cannot for the life of me get the HD into the sled. It might fit except for four posts on each corner of the HD. Do I need to remove those? Or is it the wrong size sled? It says: VanTec SATA 6GB/ss NexStar. If I need to remove those four posts from the original hard drive, please advise if you can on how to do that. Thank you sincerely for any help!