So, we are going to make one. Do you have tip where to buy bowl head like one that they use. I found this on ebay, but imho it´s still a lot of money for a piece of metal. Do you know about any blueprint or measure of bowl head? Thanks :)

http://www.ebay.com/itm/DSLR-Bowl-Adapter-Steadicam-65mm-75mm-For-DSLR-H...