sam, obviously you cannot receive a discount on brass if you have already registered woodwinds .... (as graphic example, but probably now i got you wrong)
the symphonic cube consists of 10 collections, each collection consists of a standard and an extended library.
if you purchase all 10 colections (=symphonic cube) standard in one run, you save $ 510 ($ 4.620 instead of $ 5.130 if you purchase the 10 collections seperately) - this is independant from discounts on extended libraries.
either if you have now decided to get all 10 standard libraries at once or only certain collections you receive a discount on the extended library (of each collection) depending on your registered *legacy products*
your example (registered opus 1, opus 2, french oboe, epic horns):
first step:
purchase orch strings I, orch strings II, chamber strings, percussion (std+ext)
full price:4,940 $ discount:-495 $ your price:4,445 $
second step:
purchase solo strings, woodwinds I + II, brass I + II, harps (std+ext)
full price:6,560 $ discount:-775 $ your price:5,785 $
in total (both steps) full price:11.500 $ discount:-1.270 $ your price:10.230 $
alternate example (registered the same products):
first step:
purchase symphonic cube standard (all 10 collections standard library)
full price: 4.620 $ (no discount)
orch strings I + II, chamber, perc (all extended)
full price:2.740 $ discount:-495 $ your price:6.865 $
second step:
purchase solo strings, woodwinds I + II, brass I + II, harps (all extended)
full price:3.630 $ discount:-775 $ your price:2.855 $
in total (both steps) full price:10.990 $ discount:-1270 $ your price:9.720 $
the *symphonic cube* is a package of the 10 collections, so you will have the 10 boxes and DVDs in any case (plus an additional box for the 10 collection boxes to keep them together in case you purchase SC in one run, which is said to be nice btw.)
christian