Just wanted to share some easy swap-in replacement backs for the QMX enclosure I posted on Printables. Just remove the four bottom screws to swap in a larger back to accommodate various mods.
I added three sizes of varying depth. Good way to try a few things without needing to commit to taking a Dremmel to the stock case.
Used the small size to add 3 LiPo cells, BMS, speaker, and battery charge port to the back of one of mine. Makes for a super tidy setup where I just need to connect a key and an antenna. I have did the 10W mod and limit the voltage with the QMX firmware so the 3S LiPo configuration with 1000mah cells gives me a nice power boost and enough runtime without external power. Connected un-amplified 32ohm speaker directly to the jack pads on the bottom of the PCB so it disconnects the speaker when headphones are attached. It is loud enough for quiet environments and headphones are always an option. Same deal with the DC power jack, Connecting an external power source disconnects the internal battery. Really like the setup.
Hope some of you find it useful and look forward to seeing if anyone does some nifty mods. Up next I’m going to add batteries, speaker, mic, and touch key to my other QMX…
https://www.printables.com/model/1744975-qmx-buddy-back-non-destructive-rear-case-to-make-r
73,
VE7ZAX