I was surprised by that too (AW5 on 3.5 only that is). I was going to install it on my IIe's 10 Mb Sider, but like you I don't have 3.5" drives on my IIe, only DuoDisks. I'll probably move my Sider over to another computer to install it, then move it back. A real pain, but it should work. -John