It is funny, that RAlt is bigger than RShift, while I use RShift about thousand times more frequently than RAlt.
Spdx, I like your layout much more, than minila's layout. But two things cause worry for touch-typing: shifted "ZXCV" row (0.25x to left) and small RShift. By the way, both problems could be solved by expanding keyboard by one column to the right, as matias mini or leopold fc660m do.