im not a senior member buddy
but as far as ma knowing is concen and after going through de golden tips of noorulain fatima and fida hussain shah

i can say
that yes diagrams are very important for score boosting
they can be drawn with a pen as u dont hv tht much tym to change b/w pen and pencil again nd again

its not neccessary tht they should be accurately drawn or should be perfectly scaled.....

as the examiner know k we pplz are css aspirants not de artists. they just want to c weather v know thm or not

but yes! if they r drawn neatly they might grab u good marks


Noor Fatima drew her diagrams with pen if i m not wrong... yet she was de topper if 2009