Ah... Now you've made me go & re-read the chapter on Wit Biers again.....If you want to read my copy of Rajotte's book, you're welcome, as long as it boomerangs, as it's part of a complete set.
From my re-reading (it confuses the hell out of me every time I've read it), making wits was historically a very complicated process involving four different worts: one hopped, two un-hopped & a 4th that was hopped with the "spent" hops from the first-runnings. The boiling times varied, from 60-90 minutes. I don't think we need to go to such lengths as homebrewers. We're so used to using well-modified grains & long boils these days, the traditional stuff seems to get pushed aside in the quest for clear beer.
'Glad to hear you're using unSalted wheat & oats, 'though.....
I'm not 100% on this, but you might find that the Wit yeast & Forbidden Fruit yeast are one & the same. More research required there...
And don't forget the spices - that was something I noticed was absent in your swap beer (maybe because of age?).