I appreciate all the input guys. I think we can all agree there are several ways to establish WCS and work holding setups, and as a stranger it helps to not assume anything to eliminate possible causes. I'm not new to machining and holding tolerances, but something is off here. The only subject thus far that has had a steady stream is setting up WCS in the CAM software. I mentioned earlier that I think my issue is the relationship between my Haimer offset and my WCS, which lends itself to how I'm setting up my parts in CAD/CAM and then executing. I think I'll try only using model WCS instead of stock and see where that gets me...right after I eliminate my tool height offset gauge.