I'm building a bike from scratch, and went to my LBS today to get the head tube faced. They told me I don't need it (they also told me they don't have the tool), but when I look at the frame, there is some visible unevenness at the top end of the head tube. Also, the bottom end is far from flush. This is the first time I do this, so unsure to keep looking for a shop that can face the tube, or just install the cups. It's an new aluminium frame. See the picture below, does it need facing?
I'll be installing a zerostack headset with industrial bearings btw, not loose ball bearings.