benobo

I am having issues with prints delaminating and being very weak (PLA prints feel soft and spongy and are easily crushed by hand). See the attached image for examples. the 3 prints to the left were stopped after the first layer due to clear gaps. The one on the right was allowed to continue but was ultimately a mess. My first mistake is too many variables changing: I lost my cura settings, have a new brand of pla filament, and have also recently leveled the bed. I'm not sure if it is a case of poor quality filament or some settings I have lost in cura. I'm hoping that soomeone with experience can take a look at the attachment and be able to advise what is causing this? Is this just a case of underextrusion or something else at play? What I have tried: - changing temperature up and down (200 to 220 degC). doesn't seem to help but ther is stringing at the temps tried - levelling bed - tried with small gap between nozzle and bed and a slightly larger gap - change filament diameter in materials screen (filament measures 1.70mm with calipers) - change flow rate to 115% and 140% Machine: Creality ender 5 Material: Sunlu black PLA 1.75mm Can someone point me in the right direction of settings to tweak in cura to try and fix this? Thanks