Hello,
I have one of these devices (Mk III). I can't say I found it difficult to install, but I do remember having to apply a lot of force to get the thing clipped into the ROM sockets - but once it was in it was in, and the tie-wrap wasn't even needed to hold it in place.
I have mine inside a desktop case, with the shielding removed. I also have in there a Prelude 1200 clockport sound card, and an Apollo 1260/66. I have a 2.5" 3.25GB HDD attacked to the FastATA running in PIO mode 5 and I get raw reads of up to 8 MB/s.
Without the driver that is loaded at the beginning of your startup-sequence, my hard drive interface speed reverts to the standard slow interface of the 1200's IDE (PIO 0).
The FastATA has a special OPTIONAL way to handle large drives - it is able to split up the huge space ie 40GB into smaller "Amiga friendly" partitions, so it will create different drives (below 4GB manual says)... ie DH0,DH1,DH2,DH3,DH4... and so on so that you end up with all of your drives capacity but as those additional units (depending on size of drive).
I can't remember whether I have ROM riser sockets or not, maybe I have...it was years ago when I assembled my 1200, and I haven't had the machine apart since then.
I do have everything in the case though without problems or modification (except RF shielding removed). Then again, RF shielding in a 1200 case with an accellerator card is a bad idea due to heat considerations. I do have one fan in the case that circulates air over the CPU and around the case.
The FastATA clears the keyboard by a long way, so there is no need for a tower case.
The only problem I have had with Amiga keyboards is that they warp, they "sink" in the middle. The simple and effective solution is to bend it until it is straight again, and it bends very easily. I had to bend my keyboard back to spec because if the Apollo card.
There are always people who will attack FastATA's saying they eat CPU cycles, but this certainly isn't an issue on an 040 or 060. They only tickle the CPU, if at all that.
I've never had any problems with my FastATA, it's built well, it's rock solid performance, and it's seemingly glued onto my motherboard even without the tie-wrap.
Not sure about physical compatibility with Indivision, so I'm unable to answer that question.
