Hey Mate,
Just a question, your strategy relies on you pushing for the top, that’s why you pushed that 20K gamble, I agree with that 100%. Your system works so don’t mess with it.
However your system also relies on getting a bunch of spins in at lower stakes and getting to the higher stakes so that way every failed lower stake spin makes it less likely the next one will fail, if you raise your stake too fast your top on at the 40pound won’t recover your losses because you had to do 1000 spins for not glory at 40 pounds. just remember that the top has to be able to clear your losses. Also you did hit the top relatively close to one another and recouped all your losses for that session, so what do I know lol. Keep up the hustle!