@VisiblyVaped I don't have a Flip Brick (yet), but I may be able to help.
The most important thing to remember when honing your technique is to change only one variable at a time. For instance, don't change the load size and flame size at the same time. Changing only one variable at a time should help you figure out exactly how that variable effects the end result.
I think a good starting technique would be to fill the chamber between half and two thirds full. More full and it's easier to combust, less full and it can be harder to get vapor.
Flame length is subjective to a degree, and it sounds like the Flip Brick likes a shorter flame than the Junior, which likes a shorter flame than the OG. Half an inch has been mentioned as a good flame length. That sounds good to me, or maybe a little longer.
A bigger flame will allow you to use a faster draw speed and still get vapor. I feel all of my Bricks work best with a long flame and a fast draw speed. You may need to start a little slow, but as soon as you see/feel vapor, increase your draw speed dramatically. Try and keep draw speed steady and change the placement of the flame to adjust the thickness of the vapor.
When using this technique never slow down your draw speed, as it can lead to combustion almost instantly. Instead, just stop hitting it and go for a bigger cloud next time.
Also, I'm pretty sure the air intake is not supposed to function like a carb. I would leave it open at all times. I'm sure it's possible to use it with the air intake closed off but you would need to reduce flame length and probably move the torch further away. I think you could make it work but the line between vaping and combustion would be much thinner.