I noticed that I can’t set equal sidebearings in smallcaps glyphs.
there is strange offset. As You can see on the image, the indicator is not over the left sidebearing of h.sc. It occurs when a uppercase glyph is next to a smallcap one.
The same issue on other my fonts. This happens when master’s Italic Angle is set in Font Info.
when I was preparing the file for You, I just deleted smallCapHeight custom parameter and that strange offset disappeared. I see there is no more smallCapHeight available from parameters select.