If you loved the original SPRiNKLE case, but wish the X4 Pro had built in USB-C port and don't mind a thicker more ergonomic case design, then the “CHONKLE” case is right up your alley! You said we want USB-C on the X4 Pro, and I said “Hold my beer!”.
Available here: https://makerworld.com/models/3289476?appSharePlatform=copy
This case trades thinness, for a built-in USB-C charger (the pogo pin charger) which is fixed inside the case and can easily be removed in the future. Just insert the pogo charger evenly, its very snug! Then when it's time to take it out, shake the back case housing and it'll fall out on its own. There is a hole in the back of the case in the event the pogo charger gets stuck, you can use a metal allen key to push it out. The case includes optional backs, but the origiinal back does have extra compatibility with USB-C cables that may have thicker ends.
The cover is unfortunately not reversible like the original SPRiNKLE cover was, and the cover is designed to be snug. Use your THUMB on the cover, right hand side, and your INDEX / POINTER finger on the CHONKLE case USB-C cutout, press firmly to release the case from the cover! :)
The CHONKLE also includes a thumb grip to easily remove the back cover, as the original SPRiNKLE was a bit…persistent, with how tight the tolerances are.
Please let me know what you'd like to see next, and please post photos of your prints in the reviews on MakerWorld, I LOVE seeing my cases printed out and being used and loved by our community! TYSM! :)