yes seems like good calculations. there is a lot of other sites that contain the same calculations but with lower numbers (tokomak) they are bumping their head against multiple problems except funding.
as far as focus goes it seems that they have the temperatures needed to expose the neuclius but conquering that cooling effect of x-rays will be an achievement. my whole point in the (birdcage) was to look at the field lines of the plasmoid itself. in particular the spacing between them and if it was narrow enough to keep ions from slipping between. the other question was the ends of the plasmoid and if that too would allow ions to escape.
temperature, confinement time and ion density are all key components of the fusion process as far as i understand.
keep up hope it seems that things are starting to roll again. hats off to the focus team.