i see what your saying and that probably works alot better for you than it would for me but it really isnt trial and error more refinement of your technique and all the time spent learning technique while making minor changes until you get it textbook just means as soon as you get the right technique you have already practiced it alot and therefore easier to learn than change all at once.

that worked better for me but may not work for u, i first thought u were just dismissing the idea, my bad.