Summoner: Evolution Surge spells

[mjk333]

I'm playing a summoner (synthesist, if it matters), and I'm wondering if I'm missing the proper way to make adjustments when casting an Evolution Surge spell. So far as I can tell, it appears that the only way to feed Evolution additions into the stats is to deliberately exceed the Evolutions limit by the proper amount in the Eidolon customization screen, and then delete it when the spell is over. Either that, or go into Adjustments>Other Adjustments and add all the possibilities manually (or at least as many as I can figure out)?