As observed, fuel indicators are erratic. Rapid burn to 7 (100) then in a few seconds to zero and continuing counter clockwise to 12 to looks ok amount at end of flight.  Check of fuel tanks show right amount of fuel at zero.  So looks like gauge model problem.

Aircraft was very sensitive in pitch so I adjusted sensitivity to .4.  Nice flyer.

Unsatisfactory pitch stability and control ILS and landing.  After several approaches determined that the aircraft was out of pitch trim.  A/P ILS APP with manual throttle and 110kts, a/c went below glide slope and touched down short of the runway flaps 20 or 40.  40 was worse.  Found that pitch trim was full nose up at mid slope and not sufficient to correct attitude at approach speed.  After several tests, set elevator down limit and elevator trim limit to 25 degrees from 15.5 and 15 respectively.  Trim set bug will bottom showing full nose up trim but wheel continues to work meaning trim is available.  On the rails ILS now possible.

Suggest setting low idle condition both engines fpr taxi.  Check list calls for low setting for start.  Note that setting low idle will decrease torque.  Turbo prop is slow to respond to throttle movements so make small throttle adjustments.  High idle for flight.

I love my King Air 350. Flys great. Low idle is just about a must on the ground and when coming in. I don't have any problem with it.

    I had the same problem with the King Air when it came to taxing. I found out the problem was with FSUIPC that I had installed this module affects taxi speeds for some reason or another cause when I removed the FSUIPC module I had no problems crontroling taxi speeds no matter where the prop speed control was set .
  There is also a taxi gauge out there that will work but I felt this was not realistic so removed it.