Stuck at red-getting to blonde, help?

hello, I'm two months into removing two years worth of salon applied permanent black from my natural level 7(ish) hair. I'm doing it really slowly, spacing out processes at least two weeks apart, but I feel a bit stuck.

Have used so far:

-4 applications of ColourB4, with washes with clarifying shampoos (Head& Shoulders) in between (I wash hair about once every 5 days)
-2 applications Scott Cornwall DeColour Stripper (which lightened roots massively and gave me this ginger tone)
-1 bleach bath, as per tutorial on here, using Schwarzkopf BlondeMe 40%.

Since using the stripper and bb, I have followed each process with Bleach London's reincarnation mask mixed with a bit of Loreal Smartbond conditioner.

And..this is where I'm at. I don't have fantasies of being white blonde (my fringe is, which brings me joy!) but I would love to get the back of my hair to a blonde-ish colour at least. Even if it's yellow, I wouldn't care, and would happily grow it out.

Would love some advice on what to do next; considering trying a couple of rounds of Scott Cornwall Decolour Remover, rather than bb again.

I know it may be cuticle staining, so thought that would be the safest way to find that out?

Any help much appreciated.  *stars*