Exactly how big is the Draco tower...

[Lemmink]

The CPU-Board is called Eltanin and sits like a PC-bridgeboard between the ZII and the DRACO-bus.
Instead of useing the VLab-Motion/Toccata combo you would preferably use the Dracomotion, wich is essentially a Vlab-Motion with an "integrated" Toccata for the DRACO-bus and a lot faster (due to the bus)
Tha case for the DRACOcame in two shapes, one was an ordinary tower the other was cube-like.
Go an look for yourselfe in the BBoAH

http://www.amiga-hardware.com/draco.html

OS 3.5/9 is sure possible on the DRACO but since there are some differences to your ordinary Amiga installation won`t just work out of the box.
According to this site

http://home.t-online.de/home/ing.sed/NEUKEI.HTM

a guy named Patric Hofmann made a custommade install CD for 3.5 and later for 3.9.
His commercial page can be found here

http://cash-multimedia.com/deutsch.html

I made a quick serach with google and found the actual advertiseing page for OS3.9 on DRACO

http://www.google.de/url?sa=U&start=1&q=http://www.cash-multimedia.com/ms5.html&e=7866

[Lemmink]

I will point out that there's a Dracobus card that has firewire for DV...

well not exactly, there is a Firewire addon module for the Daracomotion

http://www.amiga-hardware.com/dvmodule.html