I bought a 18 y/o ST/AML of 95% quality. Used 51 rest packs to give him SA and trained him to 99% quality. But after having 6 star quality, he gains just 3 skills for average condition loss of 17%. I used 23 rest packs to increase his quality from 100% to 103%.I used Speed Dribbling + Shooting Technique to power train him.

How many rest packs do we need to power train a FT from 6 star to 7 star quality? Is my ST a Fast Trainer or not?

(I know that there is a specific thread for this kind of query but i did not get proper answer in that thread)