I am from Bulgaria. I have two 3-leg spider dolly and three rails from you. I am extremely pleased with this product and recommend it everywhere. I was an DOP of television series and there I used constantly this dolly. I've used it in line with the red one and film cameras. I am attaching a few pictures then show "Forbidden Love". I'll give you more shots next time!
Spider Dolly, Losmandy FlexTrak