Sure. Can you start us off? Create a very simplified version of the que you are trying to make. Say where they are instructed to list 4 attributes only. Include a responses.xls file with the appropriate variables and then zip and post those two files here as an attachment. I'll see what I can do with the responses.xls file so that they can not repeat a response. Then, hopefully, you will be able to take that logic and extend it to your larger scenario with 10 attributes and the control group also. At least it will give us a place to start and the simplified sample files will let me get a better sense of what you are trying to do.