remove plugs/stoppers at base
untie the cord runnig through height of blind
pull up string untill you reach damage
pull out strip ( spare and damaged) swop over if required
pull back through strings
tie up trap all back inside the base plugs
if you have a digital camera you could take some pics of each stage and you shoud see if you put it back together correctly let me know how you get on
jobby do good, November 2008