It isn't really a visual piece, Dave--and as to how easy it is, well, as with all pieces of music, is really depends on how well you do it--for instance, it might be a lot harder than you think to get it to come out to 4'33", which, I imagine, is fairly critical--in re-reading my post, I don't see that I said anything at all about your comments on intonation and tempi--you alone would know what your intent was--