Im still trying to achieve an acceptable sound from the f chord, for whatever reason my index finger just doesnt reach enough when i use my middle and ring for upper frets, maybe my index finge is small? im trying all the angles for my index finger, and all the power i can use, is there any hot tip for this chord? i cant progress the arpeggiated f chord for classical guitar for this reason. mostly i cant seem to get a sound from the highest string, the f fret.