Thank you very much for bringing up these potential difficulties.
My first observation were suggesting that moving Dobot at 1% of its velocity should provide enough precision, but after new test, I have remark litlle trembling even for such a small move, which is potentially bad for print quality. And by the way, joins are really loose, which is totaly inacceptable in my opinion :/. Why do we have this problem, does it comes from bad mecanic part conception, or underdimensionned servo ... or maybe only not tight enough screw? (let me dream ^^)
Concerning the testing, I was thinking about printing a lot of really small cynlinder during the same batch with different curing time to determine which one was the best for a layer; In my mind, it doesn't seem be so hard, but I know I am often too optimist ^^.
I am still motivated to try this project, but I realize that it's will probably be more complicated thant expected.