RE: Evolution 60 NX in a 40 size case...
GM,
The [link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=EVOE0600]Evo .60NX[/link] and the [link=http://www.horizonhobby.com/Products/Default.aspx?ProdID=EVOE0611]Evo .61NX[/link], are two very different engines...
The former is discussed in this thread and is a light, .40 frame-size, $150 engine.
The latter is by these standards, an 'outdated', heavy, cumbersome, full-size engine of roughly the same displaceement; that has the advantage of costing $30 less.
Don't confuse between the two.
The .61NX is definitely not suited for a .40 size sport plane. It is too heavy for that.