Things have got slightly more complicated I was thinking I would just download the STL's from the duender github and that would be it but alas unless I want to do some resizing (which I don't if I can help it)
First thing is I decided to hang the corexy steppers off the back rather then inside the printer which would be fine but not when the belt adjusters are printed to the STL's both things will make the machine too big to fit into the cubby hole made for it (pictured with my current one in position. Or rather it would fit in just about but I wouldn't be able to close the sliding doors which protect it from dust etc kicked up by other activities.
So I am faced with the decision to move the steppers inside or redesign the front belt adjusters, moving the steppers might be the better option but I was quite pleased that some of the hardware from the CR10's would fit them just right off the back.