I dont know...I thing its impossible for me now to do thrill with 5 3 fingers and play the melody with 1 2 fingers of the right hand ( second page of 2nd Chopin Concerto ). I dont want to alighn it, I want fast thrill and nice expressed melody with one hand. :?
It would indeed be a thrill if you can pull it off. And I like fast thrills too.8) Kidding aside - you mean the word "trill". Sorry, I can't help you with the technique in that spot.
As far as I know it takes tons of practice to be able to do it properly. I sometimes get that measure ( in Chopin's concerto ) right, but very often it doesn't sound too good. However, I try to play this measure quite often hence I keep getting better at it.