I'm not sure if this is a remix as I didn't use any of Walter's 3D data to create this. Anyway, it is strongly inspired by his great creations. I needed a case with the least possible amount of elements sticking out from it's surface to keep form clean and also wanted to experiment with rubbery filaments like Ninja Flex. This is why the lock type is designed from scratch here, to be elegant and efficient. There are two types of file here - one suited for stiffer material like "soft PLA" or PET or even ABS and the other for more flexible ones like Ninja Flex (actually the chinese TPE was used here http://www.aliexpress.com/store/product/3-00mm-Grey-Color-NinjaFlex-Flexible-TPE-3D-Printing-Filament-1kg-spool/817624_1941979695.html ). If you want to custmize it - I recommend using any 3d software for stretching it by moving the vertices - It's fairly straightforward... In case you're in trouble drop me a message - I'll try to help. :) If printing from TPE (e.g. Ninja Flex, It's good to have temps like 195-205 deg. C, speeds like 15-30 mm/s, retraction set to zero, all speeds equal (same speed for outer/inner outlines and infill).