Hi, I have a large assembly for a room with lots of conveyors and structures(i.e. lots of subassemblies inserted into the main assembly) 

I have 2 platforms modelled in Advance steel that I need importing into the assembly. I have some success just inserting the dwg file into it after exploding the advance steel drawing. But they have slowed the program down a lot. 

Is there a different format that would