I made changes that were recommended to me buy a PCC guy. I made too many at the same time to know what did what, but its significantly better.
The BCG is actually 1.5oz heavier (weighed with scale) than the Taccom, but lost 1oz in the Buffer, so that is close to sixes. With the A5 tube, it has a fuller stroke about 1/2" more than the other setup. However, leaving everything as is, only making 1 change, that being AR15 Carbine Tube vs A5 Tube, with the same Spring, it charges so much easier and smoother in an S5 tube.
God, maybe its all placebo lol, who knows. I am not