Can someone please refresh/confirm my old memory? These are new styles built from RealTracks I already own, right? Xtra use RTs from Ulrapak while Pro uses RTs that a lessor BIAB version would have, right? No new RealTracks in either one, right?

I've always bought them regardless because I want everything (and it's just my kids' inheritance anyway) but just want to be sure I understand it correctly!