dont start breaking them down until you have built them up
also go by the weather
if its cold north east winds keep them on widow mix
even in the warmer weather feed according to the WEATHER?WIND AND DISTANCE of race
almost all books are informative but you will have to read between the lines ie
follow the weather forcasts on line for each week watching what the weather and wind is for that particular weekend
if you fly the south route and its given a strong SOUTH wind and you are only flying say 80 miles then they dont need lifting as soon