Sorry I missed the point where you are building from scratch vs starting with a ducati frame and swapping it out for this to get better track performance. My bling comment was if it does not increase performance for a race bike then it is meaningless to do it. However, if having to buy pieces and this is significantly cheaper, the performance increase or loss may be irrelevant.
Also, yes, tube frames are used extensively in racing. The issue isnt the medium, it whether the engineering has been done to increase performance vs other pieces (like the factory one). Again, may not be an issue if cost is the concern.
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