Trying to install new brake lines and keep getting small creases In the flare. I’m not using one of the expensive flaring tools but it’s a single size tool for 3/16” lines (see pictures). I have been practicing and making sure to deburr inner and outer of line but still occasionally get the crease that on 1/4 to 1/3 of the tube circumference. I’m interested if anyone has tips on how to improve my method and whether or not these creases are even an issue? See pictures.