Nigel G4ZAL has just finished his µBITx build and modded it a little in readiness for adding additional boards/hacks.
He cut the track feeding the TDA2822 and fed it with 5v from a little Radio Control UBEC. At the same time, he removed the 5v regulator on the Raduino and fed that from the UBEC as well. You can see from the photos that he has added a little ‘bus’ for picking off further 5v supplies as required.
His installation looks pretty snappy in the well used Banggood case
And the µBITx is already hard at work on 40m using the FT8 digital mode: