Yes, i run standalone (prevent noise from external power)
I have V2, and can see leakage between ports if put fingers between RF connetors (near buttons)
On LiteVNA i see small noise level drop after ~3GHz if add 50Om load on S11 measure port, also need warm device near ~5min
No any smooth used, only avg = 10x, this option increase measure data size for one point and give better quality, but slow measure time.