Thanks Andre,
I noticed that there was a more extensive comment from you, in my email, but on here your comment is consisting of exactly what I just "quoted." You mentioned the side-to-side issue, and that makes sense to me. The Monndog Labs unit is in a metal housing, and of course it would only be on one side of the iPhone (due to lens location), so... I see a possible "situation" regarding horizontal balance.
I haven't ordered the anamorphic lens quite yet, because I'm trying to decide between ordering the directly-mounted version, or one that mounts onto my existing iPro Lens setup... I'm thinking that to minimize the challenges regarding balance, I will get the directly-mounted version of the lens, and then give it a go with the Smoothee.