Looks like that regulator still sticks out like a sore thumb on the raduino and the si5351 is not on the mother board where it really belongs.? However getting the spur/harmonic issues resolved is a huge step.
The new bitix board has a revision with no socket for the 5 pin plug and there is nothing in the instructions to tell where the plug goes nor any help from seller its as if he does not know of revision so here is a pix of where it goes. ?