Thanks for the explanation, Rick. I am not a bit worried about cutting some of the tap-roots off. Nothing ventured, nothing gained. I am simply an a newbie dealing with adenium and I do tend to ask questions.
The seeds I got were labeled "Mostly obesium", so I don't know if all I have are obesium or perhaps another variety (or more) mixed in. Heck, I probably won't know when these plants grow up what the variety(s) is.