I'm currently working on a K cosplay build and have visited here a few times looking for reference photos and guides, so first thank you all so much 
I've printed out K's blaster based on Juri Pranjic's (patreon) design and am currently building the holster for it. Huge credit to buzby for the photos and measurements. I only have the top band left to go, otherwise progress is below:

Once completed I plan to upload on Thingiverse so others can use (and modify) it for their own cosplays. I'm hoping to get some feedback from Blade Runner fans here on what needs to be modified to be a bit more screen accurate - as it is, I'm erring on the side of usability for now - the opening at the base, and the width of the pieces fit my blaster just fine. It looks like there's also a felt pad on one side of the holster in the photos I've seen which would be a good idea to protect your finish, but I'm not sure if it's symmetrical.
The other item I'm currently finishing off is the Retinal Scanner. While I'm aware there are some super talented people on here making some of these already, I'm keen to try it myself
Only thing left to go is getting the springs lined up correctly - the latch works, there's room for switches, LEDs and electronics etc., - and to get a bit of detail on the top part added in. The internal frame is layered into three sections so that a) a circuit board can fit in between and b) the wires can thread through as per the screen prop.

I'm going to use a LCD screen and Teensy board (thanks to Ein for the inspiration), as well as a LiPo battery - and the case is size to fit them all, so some of the scale may be a little off. These are on their way in the post, so when they arrive, I'll post an update that will add mounting pads to the case.
If there's anything glaring I'm missed or mistakes I've made, please let me know before I start another round of printing
I've printed out K's blaster based on Juri Pranjic's (patreon) design and am currently building the holster for it. Huge credit to buzby for the photos and measurements. I only have the top band left to go, otherwise progress is below:

Once completed I plan to upload on Thingiverse so others can use (and modify) it for their own cosplays. I'm hoping to get some feedback from Blade Runner fans here on what needs to be modified to be a bit more screen accurate - as it is, I'm erring on the side of usability for now - the opening at the base, and the width of the pieces fit my blaster just fine. It looks like there's also a felt pad on one side of the holster in the photos I've seen which would be a good idea to protect your finish, but I'm not sure if it's symmetrical.
The other item I'm currently finishing off is the Retinal Scanner. While I'm aware there are some super talented people on here making some of these already, I'm keen to try it myself


I'm going to use a LCD screen and Teensy board (thanks to Ein for the inspiration), as well as a LiPo battery - and the case is size to fit them all, so some of the scale may be a little off. These are on their way in the post, so when they arrive, I'll post an update that will add mounting pads to the case.
If there's anything glaring I'm missed or mistakes I've made, please let me know before I start another round of printing