I have purchased a pre-cast concrete quadrifoil basin and now need to know how to put it together. It is in 12 pieces and each piece is over 200 lbs. I can't find a professional interested in the job, so that leaves me and whomever I can trick into helping me. I've seen one up close and it appears to have been put together with silicone caulting. Does anyone know the correct way or if this is the correct way to install? I can send a picture of it if I have confused you as to what this thing is!