I am pulling this functionality into my own fork..

I can't drop my fork yet, as the select builder doesn't expose the WhereFilterGroup so I have no way of getting the conjunctions still as the indexer is only available on the FilterGroup, but by default the SelectBuilder only exposes a Where property which is an IEnumerable<IFilter> and not the filter group.. I did put a seperate pull request in which just changed the accessor to public.

So in the interim, as I depend upon access to the WhereFilterGroup, i will continue to pull stuff into my fork until hopefully i can drop it.