Kind of. I mean the font size which I think is distinct from the ascent and descent. For Hexin, I was able to change just the font size variable in BuildFont.py from 8 to 16 for it to work. I assume it'll be the same or similar for the kbits for Quan (haven't taken a look yet). I don't know much about building fonts, so thanks for pointing me to Bits'n'Picas.
Also, I really like this font. Thank you for sharing it!