https://www.amazon.com/gp/product/B01MY7M9EA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&ps I have two of these 9" Small rig rails

https://www.amazon.com/gp/product/B01M3VCTAG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 This Vmount plate

Then I found a 4 port dtap to split power to camera and monitor ( I use Atomos Shinobi )