Thanks gang.
Xactly was I was looking for. Looks as thought the census is between half and 3/4 full. The reservoir that I have, (from Van's), has a twist on screen cap. I will fill it to 3/4 and see what happens. I will need to fly a bit to see if the 3/4 spills out. If so, drop to a half.
No acro for me, I just want to go from point A to point B. Turbulance will probably be the only thing that bumps me around a bit.
Thanks again,