Excellent Job and great advice.
Several of the Rotorway’s that I have owned have had battery master switches like this one that I just sold. And yes the Hobbs is correct. This Rotorway had 300 hours on the original engine and then the VPS turbo engine was installed with a 2000 hour expected TBO.
![[Image: IMG-4748.jpg]](https://i.ibb.co/rRW4QthK/IMG-4748.jpg)
Here is the battery master on a 162f turbo that I recently sold.
![[Image: IMG-4748.jpg]](https://i.ibb.co/rRW4QthK/IMG-4748.jpg)