How can I continue to reduce this block diagram to a single-circuit diagram?

What I’ve done so far

1. Combined W₁ and Wₓ into an equivalent block W₁ₓ (second image).
   
2. Moved the summing junction, then combined W₁ₓ in series with W₂ to form W₁ₓ·₂, combined (1/W₁ₓ) in series with W₄ to form W₄/W₁ₓ feedback around this new series connection (third image).
3. The current reduced diagram is shown in the fourth image: I now have four remaining summing junctions (labelled 1, 2, 3, 4) and blocks W₁ₓ·₂, W₄/W₁ₓ, W₃, W₅, W₆(fourth image).

My questions

• Which junction should I tackle next, and how?
• How can I move or collapse the remaining summing points without breaking the signal flows?
• What order of combining W₁ₓ·₂, W₄/W₁ₓ, W₃, W₅, W₆, and transfers of summing junction will lead me to the final Wc_g(s) and Wc_f(s)?

I’d really appreciate a step-by-step outline of the next reduction steps starting from the diagram in the fourth image.