The current reduction with a Vaccine is unknown and conservatively  we talk about a 20% reduction rather than the 30% that has been measured with inhibitors.  
The funding acknowledgements  by DairyNZ  on the methane mitigation slide needs to be clear - PGGRC ( including DairyNZ  funds)  has funded most of the NZ Inhibitor work and the majority proportion of the Vaccine. and has been the major player in all of those 4 technologies The slide tend to favour AgResearch and the crown entities which is not  correct. 
The major driver for methane is feed eaten (~85%) , has that point been made in the presentation? 