Thank you for the comment Alan, I am currently using a Sony A7R3 and a 100 to 400 G-Master and samyang 14mm for astro and while the 100 to 400 is a sharp lens for wildlife and also great for motionless wildlife manually, I find for astro it is very hard to focus due to the "focus by wire" nature which is why I decided to purchase the Redcat (not yet available, which has given me time to pause).
Indecently, I have also pointed William Yang to the video because there is a general negative vibe towards the Redcat.
What would you suggest scope wise, would you stick with the cat or go for something different?