Yet another option would be converting your SAXS envelope to an (pseudo) electron density map, (rigid) docking your model into the map with something like SITUS and then refining your model to fit the (pseudo) electron density with something like NMFF.
I have done it in the past with good results (it is very straightforward and you obtain a very nice trajectory/movie of the NM fitting).
On 30/10/15 09:59, modeller_usage-request@salilab.org wrote: > [modeller_usage] Modelling with SAXS data