Looking good, a few minor "adjustments" and you'll be there!!
Try a small neon indicator bulb as a reference. It makes it easier to calibrate and confirm the resolution etc.
There's a fully annotated graph on Buil's page ( if you haven't already got one) or PM me - I have a copy!!
PS I've just re-editted Buil's SIMSPEC spectro design spreadsheet V2.2(now E1V3), in English; removed the "flux" stuff and corrected the resolution calculation to reflect the use of narrow slits. I'll upload if I can, if not drop me a PM for a copy.
Appreciate feedback
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