I used the slim SKX caseback to lower the profile of an SRPE. It fits perfectly.
Awesome looking case, but some precautions 1. There are some QC issues, the strap bars snap in well without the bracelet attached but don't really lock in with bracelet attached,I had to use thinner bar ends to be able to get the bracelet to set properly on the case. 2 Make sure you check and or remove and add some lock tight on all the bracelets screws as I found more than one that would have fallen out. Other than that its a fabulous case combo.