For those building an Inmoov, here is a possible solution for the 6v to the 805BB servos. 12v/24v input 6v 20amp output
https://www.amazon.com/uxcell-Converter-Regulator-Waterproof-Transformer/dp/B01CUA4LQQ/ref=sr_1_18?ie=UTF8&qid=1499433015&sr=8-18&keywords=6+volt+regulator
I have some of these. The issue is that they will waste more power than a digital switching BEC and are pretty large to fit into an inmoov. My first Inmoov used these. I have switched to Castle BEC's instead which are much smaller and are digital switching which wastes less power and are programmable to different voltages through the use of their programmer device.
https://synthiam.com/Community/Questions/7398&page=11 post 103 discusses these.
(https://www.castlecreations.com/en/multi-rotor/cc-bec-pro-010-0004-01) is a 20A version. I use multiple 10A versions (https://www.castlecreations.com/en/multi-rotor/cc-bec-010-0004-00) placed in specific areas of the robot.
Thanks for the info Dave, It was your post on the Castle that got me looking but even better to have first hand experience!
You can use in line regulators for the servos. I make my own , they are adjustable by a screw on the board as well.