Hi TF,
I'd say small F3 boards based on Spracingf3 evo (like f3 femto) or pikoblx would be your best bet, cause besides they are small, they have mounting holes - unlike revo mini which hasnt got any, and mounting is sometimes pita.
Anyway, the configuration is not all that intimidating like Mateusz is trying to make it look
, as it is not "everything" that has to be set in uavbrowser - it is probably just uart port config for your RX that you'd want to do using uavbrowser at the moment. Everything else is same as for other boards (tx wizard, outputs, sensors calibration) and has full GUI as usual.
Check that thread, but read first post for more complete info.
https://forum.librepilot.org/index.php?topic=2920.0