Cable stayed bridge modeling OBM or RM

I am modeling a conceptual design for a cable stayed bridge. I have modeled other bridges in Open Bridge Modeler however I dont think it allows for cable stayed bridges. I know RM Bridge does. Should i Just try and do everything in RM? the main goal of this task is to render our conceptual design for our proposal. 

One of our engineers has already created a roughdraft of the model in rm. I am at a crossroads as whether to try and do everything in rm or model the bridge in OBM and manually model the cables. 

any guidance on this would be great! thanks