Noticed your thrusters bottom right (oxidizer) connection was located inside the thruster itself instead of external. To fix it, change line 966 (version current as of 20 Dec '24) of data.lua from:

table.insert(data.raw['thruster']['thruster'].oxidizer_fluid_box.pipe_connections, {flow_direction='input-output', direction=defines.direction.west, position={1.5, 2}})

to

table.insert(data.raw['thruster']['thruster'].oxidizer_fluid_box.pipe_connections, {flow_direction='input-output', direction=defines.direction.east, position={1.5, 2}})

should be good now

Thanks for the quick fix, and just wanted to say I'm seriously enjoying your mod!