Understood, point well taken. Based on my understanding of the system, i feel this is the most efficient route for refreshing the system:
1. Bleed and refill system with fresh fluid.
2.. Measure baseline pressure with truck at curb weight (full fluids). When I measured, I was outside the vehicle and used a broom stick to reach the height switch - procedure says to lower to L, then back to N for reading pressures.
3. Measure ride height using Toyota's procedure and correct to lower end of range (I.e. truck sits at highest recommended ride height) using torsion bar adjustment and replacing coils/packers. (Haven't done this yet)
4. Adjust ride height sensors to read zero offset at this height.
5. Remeasure neutral pressure, now it should be close to the low end of the scale.