Thanks for the feedback, folks. After some testing, I'm getting results that are unsurprisingly disappointing. Once I was able to accurately predict the bit's path, I tried a variety of feeds and speeds, and the best finish I was able to cut was quite rough and chipped. Much like the rest of you, I've been very please with my other Amana bits, so I'm considering this subcategory an anomaly. Although this is a very specialized tool. The fact that it can't do its one job on the primary material it was designed for is leaving me a bit dismayed. Oh well, you cut and learn.