[ATTACH=CONFIG]418058[/ATTACH]
These are the first five pieces which came off my tension assembly, in the orientation "up" meaning "what was facing me". Notice piece #4 is the notchy-edged washer, and the dome is facing me, while the dishy side is inwards? This also corresponds with the Singer Repair site, which Miriam sent, which says, "Next refit the two discs facing each other thus: )(, the domed pressure plate dome towards you - and lastly the conical spring and thumbnut."
So I am pretty sure I have it correct - but I am no expert! This is all brand new to me.
Opinions welcome!