Update: Well, it's done. Almost.
First - To anyone doing this project, one piece of advice. The first time you mount your drives in the cage, do it while the cage is outside of the server. If you have to adjust the backplane a little for the SAS/SATA ports to line up, or if you're just having issue with your caddys, this makes it much, much easier.
The caddys will need some break-in. This is another reason why it's good to do outside of the server. I believe that after they are docked awhile, they will likely slide in and out more easily, but you will probably have to work those metal spring clips a little the first time.
Second - On the backplane, it is completely possible to plug the miniSAS connector in wrong, with the locking clip facing the inside of the case (when it should be facing the outside). I thought it would only fit one way, and found otherwise when my rig's bays didn't light up and the RAID controller failed to detect the drives. Fixing that took care of it.
One of my caddys turned out to be defective --that is, the lights aren't working, meaning the ribbon cable, or the contacts, or the IC chip up front is bad. I just sent a message to the seller to get an exchange. The drive still works, but of course, you know I want all four cages to have the beautiful circles that cycle clockwise. There's also a blue LED that comes on at initialization briefly, and a white LED under the red button on the cages. The circles are dual-color green/amber, I'm sure for good drive/failing drive indicators.
My metal drive cage has two stickers that say "Non-Hot Plug" on the inside. It's just for warning; the cage is the same as the one in the hot-plug, just without the backplane and with different cages.
Edited by LoneWolf, 30 March 2016 - 07:12 PM.
HP ML310e G8 v2. Xeon E3-1231v3, 32GB RAM, dual-port Intel gig NIC
4x 240GB SSD RAID10 (Icydock Express), 4x 3TB HGST, RAID5, P420 1GB FBWC
Former owner: Microserver Gen8, TS140, HP N40L, N54L.
Proud Member, SchoonDoggy Server Mods Beta Test Team