Cool stuff–currently handling variable RR in Kontakt is a bit of a nuisance. Right now it usually involves "blipping" a zone to see if it exists first. This can always be cached into a lookup table (that's what I did when scripting CineBrass, for example), but the problem is that the only way you can see if a zone exists in a group/velocity/pitch is by actually playing it. If the zone ID returns "-1", then you know there's no sample. It's inefficient because ideally you should be able to check mapping-related data directly through scripting.
