4g/l of sulfite doesn't sound right for c41. If the hydroxylamine is a problem, I'd suggest using a more same amount of sulfite (ca 1.0 ~ 1.5g) and just leave out the hydroxylamine sulfate. Mix immediately prior to use. Adding more sulfite is not a good idea as it inhibits dye formation and hence influences color balance. What's more, this will likely happen differently in higher and lower layers of the emulsion, so color balance will become a veritable mess. You can correct anything in PS of course, but why not start with something decent. Hydroxylamine sulfate is easier to get than CD4 anyway so I don't really get the idea behind leaving it out.
In the DIY formulas I did not see much difference between the bonavolta recipe and the more fancy recipes that include potassium iodide.
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