I admit him a thing, I have had RDS for enough time, however I don't thoroughly know it to take out him the whole profit, the indication that you give me but it arrives, it clarifies a little but my ideas, although I have other patternmakers, Rhino, Amapi, and some other one that at this time I forget RDS the first one that I arrive to my hands, was and with the one that made some interesting experiences, but this it is a specific topic that doesn't explain to you in the manuals, I reiterate him my gratefulness for the contribution =) Rodolfo Ciminelli