Yew is a proven core wood. Has been used for decades. The core is much different than laminations, laminations are there for looks only the core wood is the working part of the limb. I beg to differ that the fiber glass laminations are the working part of the limb, they may help performance but that is all they do, the core is the base of the limb. Now as to yew, I have owned bows with yew core, bamboo core, maple core, actionwood core and wenge vertical stacked core and a combination of wenge/walnut vertical stacked core and I can tell you the wenge/walnut was the best performer I have ever shot next to the wenge vertical stacked. Not going to find that though as Bill Howland was the only person I know of that made his own core woods vertically stacked. Just my opinion.