Well I lied , I was in such a rush to get her together before I forgot how it came apart , I didnt!!
The only belt I did not get was the main drive belt. Its quite a flat section belt I think ,and maybe 4 ml wide .
I liberated a suitable rubber band in the end
It ran backwards ,which was a puzzle ,till I flicked the new belt onto the other side of an idler pulley ,and it solved it!
Runs ok ,so might just see how good it still is - or isnt , later on !
I also rebelted a Phillips N2506 ,and was pleased that works ok too. A machine for my bro in law who tighter than I am