Thanks for checking!
Understandable that the engines had to be flown "by feel" but, I'm not sure of the procedure to set up a proper fuel transfer, which I was hoping the manual would cover in more detail!
As far as I can tell, It should be something like I was doing, which was,
-Select which wing tank to refuel (usually set to port)
-then, select which hydrostabilizer tank from the distribution wheel you want to pull fuel from,
-then, turn on one (or both?) of the transfer pumps, which should then start pulling from the hydrostabilizer tank and feeding to the selected wing tank
-cycle wing tanks and hydro tanks roughly every half hour depending on fuel burn and first pilot's wishes
(EDIT: I also was able to hand pump the fuel from the hydro tanks using the method I described, once the wing tank had the fuel disintegrate I could see it getting filled via the hand pump at roughly 1 gallon/second, so I know that works at least)
(Another edit: Selecting a hydro tank and hand pumping will also cause the fuel gauge to jump to zero)