Star Merger

[ny2292000]

I am trying to create a binary system that I would eventually merge.
The binaries will be twins, so they will have exactly the same composition. That means I can simulate a single half-star...evolve it...
My problem is that I would like to accrete it to full size while keeping the composition. The problem is that accreate_X only accreate for h1, h2, he3, he4 and not for li7, c12, n14, o16
Gemini told me that in the past that was possible.
I am using mesa r24.08.1
Could anyone provide me with some guidance?