My chapter started out as a local - Sigma Iota Phi. The founders had initially wanted to bring AEPhi to campus, but Panhel didn't want to expand. Two years later, though, we re-approached Panhel and they were amenable to expansion - AEPhi was interested in colonizing, and we were a chartered AEPhi chapter within a year.
Having new "everything" was a bit overwhelming at first. I still have my SigIPhi badge and a couple of lettered shirts, and I was a bit sad when I realized I wouldn't be able to wear them again, but it wasn't long before I had a shiny new AEPhi badge and some letters.

SigIPhi's and AEPhi's ideals and history aligned pretty well - AEPhi was originally founded by seven Jewish women who wanted to form an organization based on Jewish ideals while being open to women of all faiths, and SigIPhi was founded for the same reason (by seven Jewish women, yet!) 84 years later. So in our case there wasn't too much of a "culture shock".
Suddenly being answerable to a national organization was a bit of an adjustment - "you want us to fill out HOW MANY forms?!" But the up side of that is all the support we got as a fledgling colony and new chapter.
The new colony's initial membership consisted of all but two members of SigIPhi - one sister was an alumna and the other chose not to affiliate. (The alumna went through our pledging ceremonies with us, but AFAIK she was never initiated.) We then doubled our membership over the next few months (which included formal recruitment).
A few bits and pieces of SigIPhi's legacy have survived within the chapter. The chapter's history is on the web site (I wrote most of the copy for that page, and the copy has evidently not been changed in 15 years). I believe the history is discussed during new member education, but not heavily emphasized. The chapter sometimes incorporates purple decorations along with green and white, as SigIPhi's colors were green and purple. Other than that, though, SigIPhi is in the past.