BMWland forum is inhabited by some knowledgeable chaps, probably a bit too specialised for a forum like this.

For what it's worth, and too late for this particular querstion, i never dismantle both sides of a fairly complicated drum set up (they never look it at first), always keep one side complete so i have a correct pattern to refer to...in the rare event that i have had to dismantle both sides then accurate drawings are a must.

They look so simple till all of a sudden you have three or four springs, two that looked reversible...till your realise they are far from that, did that long one go into hole B from the back and turn?, and did that narrow edge go into the slave cyl or the pivot point?

That's before you get to the thorny question of leading shoes..;)

''I was told many year's ago that rear brake shoes should be fitted so that it appears the friction surface has been dragged round the shoes by the drums''.

Didn't rear drums usually have one leading and one trailing shoe...the latter becoming the leading shoe in reverse....and front drums generally being twin leading shoe set up?