The truth is that I asked a specific question and only people with good experience in carbon could answer, but here among those commenting, no one has much experience in carbon and that's reality. If I didn't have the right to think that someone here had experienced this and to ask the question, that's your problem, the problem of the little band of little friends here who ensure that many experts don't do not or no longer post here. I post in several places here on the forum and have no problems anywhere. I can give you some details on carbon, anyone using 1mm thick tubes and expecting to do low deflection is completely off track, a 0.8mm thick tube is pretty strong and even 0 .7mm to do the job, which will result in a significantly lighter final mass. And for your information, if you had emptied your shaft over the first 6 inches you would have noticed a good difference in deflection. Smooth On is one of the best foam companies and they sell flexible and hard which is very hard, the salesman told me many use hard for carbon shafts, I have always used flexible, I will testing between the 2 by myself and later, because I don't have time for that. There are certainly more than one who have done these tests, some will share their experience and others not, in any case if the thread has allowed certain carbon enthusiasts to learn certain things that is so much the better. When I ask a question about a Mustang and a guy tells me how his Camaro is, my attitude can change very quickly.