The finer points like 110.3(B). I have not seen this panels instruction sheet but, I doubt it shows you how to use half of the neutral assembly as a ground bar. If the panel does not come with a ground bar, you are required to furnish one (and not necessarily the isolated one) to use it as a subpanel. You are way ahead of far to many installers as you seem to know the requirements for grounding the subpanel.
