This is actually something that's been on our TODO list for far too long, ideally this should be part of the library - fancy helping out - or at least being a testing guinea pig?
absolutely, i would love to help with this. the major challenge I see for getting everything fully functional in my active codebase using the new backend is Eigen. I continue to push the boundaries of Eigen with respect to expression templated numeric types, ha. i absolutely love that library! by the time I am done with my code, it will be expressions and templates the whole way down. i am guessing that personal emails or the dev list are the best place to continue discussion of helping work on this part of the library?
Yes, either the devel list or email me directly. John.