The trick is getting a kettle that fits the brew chamber on top, so it steams while the water boils, I use a bonavitta with a mesh strainer as it's mouth is a bit too wide, but it seems like the fellow is almost a perfect fit.

https://www.reddit.com/r/FlairEspresso/comments/j53vy0/fello...

Ah, triple heating will take some time. I usually double heat if I'm brewing a bougie light, single otherwise.

Sibling suggested heating the chamber with the kettle, in my experience that has caused the silicon wrapping to deteriorate.