Shrink kerning of italic “y” with TeX Gyre Schola Math

Hello everyone.  I have been using Pagella so far but some of its
characters just look weird.  I like Schola much better.  But this
code...

--8<---------------cut here---------------start------------->8---
\definefontfamily[mainface][rm][TeX Gyre Schola]
\definefontfamily[mainface][mm][TeX Gyre Schola Math]

\setupbodyfont[mainface]

\definemathconstant[type][type]
\definemathconstant[theory][theory]

\starttext
\startformula
  \type\quad\theory
\stopformula
\stoptext
--8<---------------cut here---------------end--------------->8---

results “type theory” to look like “t y pe theor y”.
\setupmathematics[mathconstants=upright] makes the problem vanish
but I want italic constants.  Outside of math mode, {\it type
theory} looks good.  So, it's really about italic Schola Math, I
think.

I tried stuff like this without success:

--8<---------------cut here---------------start------------->8---
\startluacode
fonts.handlers.otf.addfeature {
  name = "ytightname",
  type = "kern",
  data = {
    ["r"] = { ["y"] = -100, },
    ["t"] = { ["y"] = -100, },
    ["y"] = { ["p"] = -100, },
  },
}
\stopluacode

\definefontfeature[ytight][ytightname=yes]
\definefontfamily[mainface][mm][TeX Gyre Schola Math][features=ytight]
--8<---------------cut here---------------end--------------->8---

I would appreciate any support very much as I want to submit my
master thesis on Saturday.

Mekeor
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