Tchu, forgive my postings on your issue. They are not a personnel dig at you but just my way of pointing out the wrong's as I see it that you have been given advice on by your mentor/LBKA.
Your situation isn't the first we have seen recently on here and another new beek has had issues following questionable intervention from a mentor/more experienced beek.
You are going about it the correct way and asking questions which we can advise on, the joy of the forum is you can take a consensus on the advice given and then think through the replies and add logic to them.
Not all LBKA offer good advice, some stick to the BBKA mantra of teaching and as I have found with my LBKA, they don't like others polluting their teaching with logic/common sense of alternative thinking.