I agree with all you explained about taking report of all tracks and I know what you mean and yes I spent about a month only to take notes of my styles Element Tracks sounds and then I started combining the set. That was for my Pa900 last year and it worked for 80% of the styles. I did all steps as you described except I did not pay attention to the "Original Sound Set" square if it was checked or not while doing my reports, I learned something and thanks.Only when and a Style has "Original Sound Set" square (8 tracks/TRK.SEL) blank you have to edit track intruments in
"Style Play" mode since "Record" mode informations are ignored !!!
Now I am going to give another try at Pa4x and combining 3 remaining styles that caused the problem with the difference that I am going to pay attention to this "Original Sound Set" square if it's checked or not, in despite of what I said before about giving up...

So last question just to make sure I understood everything correctly before trying:
1- While taking the report of all Styles Tracks Element' sound if the Style has "Original Sound Set" square blank (Unchecked) I have to edit track instruments in "Style Play" Mode?
2- If the "Original Sound Set" square is not blank (Checked) so I have to do the same job in Style Record Mode?
Thanks