For the last several years SEP has been developing the capability to handle 3-D datasets. On the software end this has meant the development of a new processing environment (SEP90) and new visualization tools Biondi and van Trier (1993). Building velocity models for 3-D datasets have also required a whole new set of tools. The industry standard for model building, GOCAD, has attempted to fill this need. GOCAD has many desirable features [such as Discrete Smooth Interpolator (DSI) smoothing and a layered approach] but also several drawbacks [problems handling (3+)-D datasets and including user supplied code]. As a result, we have continued Clapp et al. (1994) in our efforts to build an interface between AVS, which specializes in handling multi-dimensional datasets and easy user-inclusion of code, with GOCAD. We have extended the initial efforts described in Clapp et al. (1994) to create one super module Project Manager that offers the ability to display GOCAD surfaces, to create surfaces [in the manner similar to Clapp and Biondi (1994)], and to grid simple models Berlioux (1993). All of this is provided within an interface that allows many of the useful features of GOCAD.