I had to check the fine print on those cables, because most go micro-SD to regular SD reader. The regular SD reader means more weight and bigger footprint outside the case. It would probably work, though. I used micro-SD to micro-SD to keep it small and light.
Temp: I suspect that the temperature data would be off, artificially high due to the Flytrex's temp sensor proximity to the P2V battery. I have to admit I forgot about the temp sensor on the board (despite having watched Pull-up's Flytrex video 20 times!), and frankly was more hyper-focused on shooting for a clean, no-wires looking install. I assumed the GPS pass-through and baro sensor would work, and they do. How much the temperature could be off, not entirely sure, but I'll compare some Flytrex temp data against the actual outside temp the next few flights, once it stops raining here. FYI the recorded temp for my 3 min test flight was around 70 F, and the outside temp was supposed to be 67 F.
What is kinda weird is the flight data actually showed a decrease in a couple of F degrees temp over the course of the flight - but that may have been due to increased air circulation inside the P2V case during flight, moving moving more air over the temp sensor and cooling the air around it?
Pull-up, I considered the battery bay access option, and mucked around with installing the card-reader end in the left side of the bay, but in the end it came down to a combination of fat fingers and not finding (read: impatient) a reliable mounting/storage spot for the cable end (getting it out of the way of the battery). It's also not really a standard ribbon cable; it's a very weird flat extension cable with a consistency not far off aluminum foil. I think it is designed to live inside a computer case, and I didn't want to have to manipulate it constantly and risk it breaking.
If the rain holds off today, I'll go flying!
