Your parts are not printed correctly. That gap is due to the issues you're having with the bottom layers. That curl on the bottom should not be present.
When you print our parts, you need to print them all at the same time and in the same orientation so that any error is across every part, which minimizes that issue. It looks like your z height has not been properly calibrated as well as your bed adhesion. You'll need to fix those issues first.
Your parts are not printed correctly. That gap is due to the issues you're having with the bottom layers. That curl on the bottom should not be present.
When you print our parts, you need to print them all at the same time and in the same orientation so that any error is across every part, which minimizes that issue. It looks like your z height has not been properly calibrated as well as your bed adhesion. You'll need to fix those issues first.
Make sure you print only the parts from here: https://www.printables.com/model/354998-3dchameleon-mk4-upgrade-parts-with-ptfe-grip
Bill
Here a pic of the gap...