"I used Feast Watson Maple Prooftint Stain as I have seen it used in a video tutorial but the result was far from expectation, as this is something I can't change this late in the build I will have to come to terms with it or consider painting over it."

I have used the FW Golden Teak on the maple neck for my TB-4 bass - and even that came out a tad orange. See the link at https://www.buildyourownguitar.com.a...l=1#post210834.
Quite a few of their stains are darker than advertised - mahogany especially!

You may be able to sand it back and reapply a diluted coat. Painful, but possible.

How does the neck look next to the blue body?