The F chord I originally learned was played by Barring the entire first fret. They teach a shorter version here where the 1&2 strings are held down with your first finger. Starngely this seems to be tougher than my original F chord. If I get the 3rd and 4th strings to sound good then the first two strings are messed up. If i get the first two strings ok then the others don't work. is it just practice or do i need to build up my finger tips or is it something else?