Blinds, Shades and Shutters - continuous cord too tight

I've got a couple cellulars where the blind hits the continuous cord deal that you screw into the wall to hold in place. The windows were only trimmed with sheetrock instead of wood trim and turns out they aren't overly straight and happen to have bows right where the hold down for the cord is at so it's a tight fit. Any suggestions on how to fix? Can the cord be shortened and if so, how would you do it so there isn't a knot in the cord? Alternatively, are there other ways of securing the cord down without using the plastic piece that comes with the blind so my blinds don't hit on it every time I raise and lower it?

Measuring is always a must . Sounds as you have an inside mouted blind . If the casement is too narrow at that point of tentioner , you may be stuck . Continuous loop cords are patented . No installers have to tool to fuse these once they are cut . They can be ordered per size needed . The tentioner / hold down you have may be removed and taken apart (must wear safety glasses as there is a spring inside and these do not come apart easily) to leave the loop free . Or , remove mounting bracket and leave pulley attatched . However , these tensioners are for child safety . They should be mounted loose enough when one pulls the cord , the pulley will be forgiving enough to be pulled outward giving user plenty of space for hands to move up and down while operating . Many tentioners are installed tight and this is incorrect . The spring inside primary function (beside child safety fuction) is for smooth operation . Too tight and the loop cord will soon frey and break . Usualy a $70.00 minumum repair . Removing this tentioner per safe , will eliminate your problem and shall no affect the warrentee . Finding another guide small enough to fit and not interefer , may help you . Relocating the tentioner is an option . Most cases tell me raising this just a bit will keep you close to existing holes And may not be possible to remount without carefuly pre-drilling . Perhaps ordering new loops will be best . They come in increments of 10" (48" to replace a 38")and you may be satisfied with a longer cord .