I also converted an old Durst 1200 Laborator enlarger to a copy stand. It's very smooth and comfortable to use,but, like Paul's one it's made for slides and negs and for small reflective originals up to A4. For bigger originals as A2 I use studio stand. For lightning I use Profoto studio flashes with soft boxes. I'm not sure of their color accuracy, but in practical use I think it's good enough. And they are very easy to use.
A2 is very interesting size to lens choice for reproduction; it's not in real macro magnification range, but it's a little too near to normal magnification too.
I use (like Paul) Sony 7rmk2 with Canon 100mm macro lens for slide and neg repros and for little reflective originals.
But for A4 and bigger originals (like A2 ) I use Zeiss Sony 50mm F1,8 normal lens. I think it's very good in that magnification range. I have not seen any reason for focus stacking when repruducing reflective originals in that size. (But with smaller slides and negs yes)
In film times I used Pentax 67, Hasselblad 500c and Bronica 6x7 and 645 macros for same kind of cases with good results.
I think You should try your Hasselblad macro lens and 80mm normal lens. I believe both will do the job as well.
