Need an extra MacPro hard drive sled for swapping secondary hard drives? If you do not need to swap out your primary hard drive, take it off of the sled and carefully install it permanently into the first slot without the sled. First put some thick felt on top of the grey fan box. The hard drive is supported by the grey box and felt perfectly solid in this setup. Now you have a free hard drive sled to swap drives in the other three slots -- this is better than pay $29 plus shipping.[robg adds: While I do have a Mac Pro, I'm not going to test this hint ... I don't swap drives often enough to merit a spare sled. Looking at the interior of the machine, though, it looks as though it would work fine -- though clearly it's not the recommended drive mounting method. Proceed at your own risk...]

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