same for me, manual is 2.5 bar and 2.9 bar
2.5 X 14.5 = 36.25psi
2.9 x 14.5 = 42.05psi
I run 38 & 42.
re: the tail pack. I guess that makes a difference if you mount it forward.
Besides, a soft bag on a ventura rack is much less mass than a top box, and less affected by cross winds too
Its personal preference I suppose
