I just received my Kando adjustable waste gate actuator and it's a piece of shite, lovely machined and built, just poorly designed. Even with a 1 Bar spring, it has less spring pressure than the stock RB20 actuator. The point of difference is the size of the diaphragm, the Kando is 45mm and the RB20 is 60mm.
60mm Ø = 2.36 inches, π r² = 4.37 square inches x 10psi = 43.7 lbs spring
45mm Ø = 1.77 inches, π r² = 2.46 square inches x 14.5psi = 35.7 lbs spring
Clearly, if you are going to use a bleed valve, electronic or manual, you are better off with the RB20 actuator.