Not sure about your tek, but if you're doing an acid/base then you don't want to fully evaporate the solvent. In fact generally that seems a bad idea, as you'll get impurities.
As for D-limonene, you can get it from
www.jimjamshop.com, fairly cheap. And MHRB from there as well, so double up
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My order came within a week.
Fumaric acid is available on ebay.
So if you have d-limo and fumaric acid, it's just a case of basifying the MHRB, so yes, CaOH should work, but in the BLAB it suggests using vinegar originally with the MHRB, I'd assume to start dissociating the alkaloids.
Bah, I'm a biologist, chemistry confuses me.
But yeh, jimjamshop for d-limo
Andross is waiting for SWIM. And one day, SWIM will defeat him.