Thank you so much Shai for sharing these mods with the community! I initially tried vanilla Colemak and then Mod-DH but it really wasn't until these mods that Colemak finally "clicked" (pun intended :) ) for me. I started using the first mod ("Shai1") as my daily layout and have made some small changes that I wanted to share (note that they don't preserve ZXCVB).

I was finding the left index finger stretch to G effortful so the first change I made was swapping G and V to yield:

QWFDV JLUY'
ARSTP MNEIO;
ZXCGB KH,./

This provided a nice "finger symmetry" feeling when typing the GH bigram. As I typed with that layout more I still found the left index stretch to V effortful so I swapped the less common Z with the more common V to yield:

QWFDZ JLUY'
ARSTP MNEIO;
VXCGB KH,./

Though this introduces an AV same finger bigram it makes typing V far easier and feels worth it to me. The Mod-DH keyboard analysis tool gives the first changed layout (using traditional configuration) a same finger frequency of 1.67% and total score of 1.78 while the second received same finger frequency of 2.00% and a total score of 1.798 so I don't *think* there is anything obviously poor in their design and just wanted to share these changes in case they were helpful to anyone else exploring Shai's mods.

Thank you DreymaR for reading my post and providing your thoughtful guidance. I really appreciate it. It is good to know that a SFB% of 2 or more is considered high and I checked out the "Q Crew" website (https://colemaq.github.io/) which gave me some further optimization ideas to explore.

I just thought I would clarify, my intention at the start wasn't to cherry-pick bigrams (though that is an excellent phrase that makes me smile :) ). I was just trying to reduce some strain I felt and happily stumbled on the smoothness of the GH bigram with that particular variant. All the best.

I don't see any downsides compared to DH, it's just a preference. Some might argue about the index finger or middle finger usage while pressing 'C' location on qwerty. I don't mind.

I had used Shai's mod for a while and settled on using the Vanilla version for the left side of the layout as I enjoy 'd' being on the home row. Swapping 'm' and 'h' actually makes sense because of heavily used punctuation marks, stretching to 'h' sometimes becomes a problem. Can't argue with that. Hence, the swap between ' and ; is also necessary in my opinion compared to Vanilla.
This is currenty the most comfortable I'm typing with on Monkeytype.com (quote, medium).
I call it Colemak-H

QWFPG JLUY'
ARSTD MNEIO;
ZXCVB KH,./

Would it make sense to swap M and K for non-ortho keyboards? Bottom row a lot less of a stretch, at least for my index finger.

I see, thanks for the info.

That's just one G-P swap away from Colemak-DH (with half a Sym mod)! And I don't think that swap does you any good so why not use Colemak-CA(W)S at this point?

On a side note, I think it's a bad idea to show the Angle mod on a matrix graphic, as the Angle mod is for row-staggered layouts only. You probably have the right idea, but it'll confuse newcomers if you do that.

Colemak-CurlAngleWideSym on an ANSI board:
----------------------------------------------------
1   2   3   4   5   6   \   7   8   9   0   =
  Q   W   F   P   B   [   J   L   U   Y   '   -   ;         Cmk-CAWS-ANSI
   A   R   S   T   G   ]   M   N   E   I   O     
     X   C   D   V   Z   /   K   H   ,   .
----------------------------------------------------