I've added the heartwood belly laminations to the little Yew sapwood bow. I haven't been brave enough to take it to full draw yet, but I've pinged a couple of arrows out of it and pulled it to 40# on the tiller. It's much quicker and looks quite cool. I haven't wiped it with varnish so it looks dull in the pics. There is a fair bit of set as I didn't pull it into reflex when I glued on the belly (I didn't want to risk breaking it, and as a short bow a bit of deflex helps with the long draw).
It's very narrow at the grip and I've added an extra belly strip to provide extra strength over the splice.