Hi Bachus

Not sure where you got the upgrade prices from, as apart from the stand, pedal board, speakers & swell pedal, there are only sound pack options available. (Similar to the Abacus but less of them)

Remember the Wing and the other (OAS7) instruments have a different OAS version; therefore feature upgrades are not transferable.

This is where I think the confusion is arising. (All the feature upgrades (Most of which are standard on new OAS7 instruments) and most of the sound packs are for OAS 7 instruments only)

Bill