I had hoped to use Duofix cistern and frame for my wall hung toilets in the upstairs bathroom and en-suite.  As you can see from my plans these toilets back onto the coombe/void/storage space, where the stack is.   But looking at the Duofix system they appear to be designed only for vertical outlet or sub horizontal, perpendicular outlet.  Has anyone experience of this situation?  Is there a reasonable get around?  Or another system other than Duofix that I could use?  I'm reluctant to