Seems to be a popular topic these days.

I managed to drain the MC by accident during a caliper change. Turned out the r/b caliper had incorrect halves so I have had it changed a few times now. Then bad lines...then bad hoses....then.....Both Ft cali's are rebuilts and are now appearing correct.
I have bled the system 5 times, built a power bleeder and done that twice now. Still light goes on...pedal goes to floor.

I am assuming I have air in the MC. I am now preparing to bleed the MC on-board. Any tips for me?
Do i need to submerge (and keep submerged) the ends of my brake lines that will circle back into the MC or do I only need to observe the flow of fluid/air?

I assume i will do this on-board by caressing the brake pedal? Do I need to cyle the brake pedal or leave it locked down at any point during the mc bleed?
or are there any secret Swedish methods?

This had been a very very painful experience that I am fed up with and it is no longer fun!! But I will see it through.

An earlier post by Vrolvo states a badly adjusted booster screw. Can someone shed some info on that?

My brakes were perfect before I decided to change a caliper and introduce this 4 week nightmare
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420,000KM and still ticking