Looks good. I am happy to hear I inspired someone to further modifications. Good job my friend.
I considered a mod like this at one point and "for me" decided that it would not gain for me the things I need (larger and cheaper drives). However, it was still a good idea and i am glad someone pursued it.
The one place I would caution other modders on with this type mod is to really work the SATA adapters. I large majority of them are just not up to 24/7 and/or heavy work loads (transfering huge amounts of data).
Good Job! 