Here is an updated geometry with the addition of size Small. This size is mostly proportional except for head and seat tube angles at 73 and 72 degrees, respectively. That is the best I can do without further compromising the proportion and ride.
The geometry also shows a slight change in rake from 60mm to 63mm. I decided to tweak the rake after riding a 60mm rake extensively with the Neo Moto, the Quasi Moto, the Hetre, and the Pari Moto over the weekend. This was also to address a minor design dilemma I had with the smaller frame sizes.
The standover height is now based on the Neo Moto 58c.
Click on the geometry to embiggen.
Click on the picture to embiggen.
As far as tubing, I am now leaning toward 8/5/8 for all sizes. There might be a slight variation among certain frame sizes. I will share further details as they become available.