Thank you so much! All parts I used are aluminum and stainless steel. Everything was designed and assembled by me except for the remotely controlled head which is by Proaim (and FS7 of course). If I have to estimate a cost for the sale, I think not less than 4000 US$. I don't know the exact cost of buying all the parts and the number of hours I spent to assemble everything... but I'm sure it was a lot...