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After three failed hotfire attempts at bluShift in 2025-2026, we learned the main reason: it turned out we'd been filling with gaseous nitrous this whole time, because there was a typo in the order. The order should've been NS RF 64S, but instead NS RF 64 was ordered which is very conveniently a nitrous tank with no siphon tube. YOU NEED A SIPHON TUBE FOR LIQUID NITROUS!!!
Because we still had 3 full cylinders of gaseous nitrous with no siphon tube, we made a quick 80/20 rectangular prism structure (see below) and just put that at the bottom of the gas cylinder cart so that the liquid is at the bottom (since there is no siphon tube).
photo of 80/20 structure on its own, then with the bottle on the cart on its side, then flipped to be added
How a siphon tube works:
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