New Build Advice 4-in-1 ESC

[DS123]

OK I'm still quite new but have a couple of brushed micros and a 210 build under my belt most of which went well. Now I'm embarking on a new smaller build and bought a Racerstar 4-in-1 ESC however I've since discovered that power does not come out of the 4-in-1 (not this one anyway see link). So my question is how can I make a build without a PDB? I was going to run the battery straight into the ESC and then thought it would power the flight controller but that's not the case. Also just to note I already have 2 flight controllers so I don't want to buy another which could take power straight from the battery. Can anyone help?

4-in-1 ESC: http://www.banggood.com/Racerstar-RS20Ax4-20A-4-in-1-Blheli_S-Opto-ESC-2-4S-Support-Oneshot42-Multishot-for-FPV-Racer-p-1068210.html

[DS123]

So something like this would do it?

https://www.aliexpress.com/item/1pcs-Matek-Micro-BEC-Step-down-Module-5-12-V-Adjustable-Output-2-5s-Lipo-Battery/32789691186.html?spm=2114.10010108.0.0.U44lBk&scm=1007.12908.37901.0&pvid=0326df7a-22bf-4935-b773-e53b15b1fcf0&tpp=1

It would be smaller than a PDB and would keep the stack to only 2 boards not 3.

Thanks

[DS123]

Good point. Not thought that far ahead yet. I think both are 5V.

[DS123]

It's going into this frame:
https://www.aliexpress.com/item/Mini-130mm-130-Carbon-Fiber-Quadcopter-Frame-Kits-3030-propeller-For-FPV-QAV210-210-ZMR-250/32696509592.html?spm=2114.13010608.0.0.5KEs8d

I was hoping to have a low stack so I could cut down on the height. Maybe it would be easier to just include the PDB after all. I have seen some people place them flat on the carbon with tape underneath. I'll have a dig around to see if I have a flat PDB tonight.