Just number crunching here. In my tesets I have further reduced base Accuracy too: Beams 70%, Missiles 65% and Kinetics 60%. The highest possible buff to Accuracy is 115% (Techs, Traits, Component stacking). This will take Accuracy of Beams to 151%, Missiles to 140% and Kinetics to 129%.
I have added base Jamming to hull sizes: Tiny and Small - 20%, Medium and Large - 15%, Huge and Cargo - 10%.
You can then gain a soft maximum(4 Thrusters) of 285% from Techs, Traits and Components. This takes Jamming to 77% for Small and Tiny, 58% for Medium and Large, 39% for Huge and Cargo.
Sidenote, with 4 Engines and max Tech average moves is between 28 and 37 depending on Race. With a movement cost of -50% so in effect ships move 56 to 74 moves per turn.