Holy Simoly so far is testing well.
I think the loveseat and ottoman piece will still be required, since when trying to use the single piece it changes to left/right pieces. And when using the ottoman as the single, then there is no back to match the other pieces. I will slave them to my new modular piece.
Haven't looked at the Ektorp one.
Edit: Okay, so with all the options the one thing I cannot get to work is the single to stay a single to make it look like the loveseat. I've made new packages to get them really modular, but the question is where do you want the textures pulled from? Currently mine is totally independent so no recolors of HS ones will work. If you really need the loveseat style I would recommend using the single one to create as many lenghts as needed.