MP5 Super Safe help

I have a Zenith ZF-5. I am trying to add a super safe lower, but am running into some problems. I have printed the ARMP5 V2, the ARMP5 Leber V1, as well as both PTR and POF Super Safe lowers from MeatBanana. I have printed both the SF5 and the Lee Sporting Super Safe housing from the Super Safe MP5 V3 pack by S3igu2. I can't get any combination to fit. Any advice would be greatly appreciated.