Author here: The code is up on GitHub.

The probes I used seem to help identify good configurations, but are quite noisey. A small probe set was initially used to make the scan tractable, and then the higher ranked models were retested on a set ~10x larger.

Author here: That was done in this blog post, in the beam search. I started with the best re-layer configs, and iteratively added more blocks, including the same multiple times, during a long beam search.

It turns out this does not help (somewhat surprisingly).

There was some work done on this a while back, during the FrankenMerge craze of 23'

I am working with TurboDerp to integrate this into the Exllama v3 format.