I also have a Nodal Ninja, but it is not comparable with the MrotatorB and is not suited really to newbies. For what it is it is OK. But for ease and perfect nodal stitching the MrotatorB will be the best money ever spent for the FC-E9 lens.
I also doubt there would be enough adjustment with the 8700 - Adaptor and Lens on the Nodal Ninja and the weight will cause some flex which will cause errors in the stitching.
But of course this is only educated advise. If you wish to go with the Nodal Ninja then Bill Bailey is your man in the USA and Canada. Like Agnos tell Bill you were talking to Smooth.