Looks good. It essentially separates phonotactics out of conjugation patterns instead of conflating them, which works also very well with how I learn languages. How to conjugate then breaks down to finding the stem (yes, some learning is always involved), and then there are not even different conjugations, but there are simply vocalic and consonantal stems -- all the morphology is in the suffix (the 'secret vowel') and the rest is phonotactics. I am sure there are irregular verbs, but probably this explains 90% or more of the verbs with simple rules. For me, this creates a perfectly logical system. Thanks for the overview!