Well they start out pretty ugly... then they get a little better. Using Wenge is no fun as it splinters and cracks really easily when the pieces are so small. I much prefer a nice rosewood variant instead. Results are little taller bobbin than a stock one because the core has to be larger on a wood bobbin than a plastic one. I changed over to Titebond to assemble the bobbins as I worry about the longevity of CA.