Wifi on Pixl.js

@Bernd: Were you already successful?

I'm also thinking about getting the Pixel.js, but I really would like it to have wifi too. So in here https://shop.espruino.com/accessories/esp8266-esp01 it says:

Other boards such as the Espruino Original and Pixl.js do not contain powerful enough 3.3v voltage regulators to reliably power the ESP01, so while it can be added you'll need a separate 3.3v voltage regulator.

So what would I need to do? Replace the voltage regulator on the Pixel.js with another on? I really would like to have a small footprint wifi module on it instead of an extra shield.

Would be Pixel.js together with the above ESP8266 module fit in the acrylic case?