On Monday, October 15, 2018 at 9:42:00 AM UTC-7, Roy B. wrote:
Jonkers uses a modified garden sprayer that fills through the vent hole. You pump it and it squirts into the hole through a reduced hose. It works OK but it's another piece of stuff bouncing around in your trailer.
ROY

Correct.
Did that while flying JS1C.
There is also a second tank for C/G adjustment which is a fantastic idea.
With the supply on the HS it'll gravity feed like a Schempp-Hirth or the aforementioned LS6 (also ASW20) mod. Can be done while filling the wings, as the dump valve is closed.
Jim