Oh, I see. I thought you were saying that the Shugart interface wasn't compatible with the Amiga or something.
Internal installation looks rather simple, in my opinion. Rig up a few simple to make power and drive cables and install.
But I guess if you don't like tinkering with wires, etc, even with basic stuff like this, it could be a turn-off.
I'm sure that the drive could be made to work externally. The external disk drive port on the Amiga is probably some simple variation of the Shugart interface over DB25, plus some extra lines for power....and maybe a simple circuit to identify the drive as DF1:
If you could figure that out you could probably make a cable that would allow this device to work externally.