Mainly I am looking for limited cooling, just the real hot afternoons in July and August. Most of the use will be heating in the winter. My fingers can't take working long periods below 40deg .... Fortunately I only have to deal with it for 3 or 4 months.
I have always liked the idea of the ductless units, and making them in an "Idiot Proof" DIY installation is just icing on the cake.