9434 is what we have. Installer said wires would not make the turn without raising up the 9434 Topcon junction box. He cut hole in the top of Trimble box then put risers under Topcon box. We are going to try removing the risers and mounting the Topcon box on top of Trimble box. If that doesn't work we will fabricate something. Did you ever get any pictures of a D5K2 mount? I guess D3 or 4K2 would be the same.