Hey do u accepting orders ????
I'm sorry, with work and school I'm finding it hard to make time for other things. It is quite easy though.
Once you get the Sony SPA-ACX1/B QX Case for the Sony Xperia Z1 do the following:
Cut the sides off with an X-Acto knife. You won't need to cut flush with the back of the case but come close as possible.
Use a manicure sanding file (that's what I used) to sand the remaining plastic flush with the back of the case (The manicure sanding file easily scrapes off the plastic).
Sand the back side of the QX case (I don't think this is really necessary though).
Before you stick the QX case to the XZU case make sure to attach your XZU case to the phone (This will help to get a perfect alignment with the camera hole).
Lay your phone w/case on a flat surface (display facing down of course).
Now lightly spread epoxy (for plastic) all over the back side. Make sure that none of it will seep through when you stick it to your XZU case, and don't spread the epoxy to edges).
Once the epoxy is on, use your phone's camera lens as a starting point for aligning the QX case to your XZU case and set the QX case on top of the XZU case.
Quickly adjust alignment before the epoxy sets in. A ruler should help if you can't do it by eye.
It's important to note that the alignment stage is critical because once that epoxy is set you won't be able to make many adjustments. And when you are applying the epoxy to the back of the QX case, try to do it as fast as you can (No need to rush but don't take your time).