With efest 18350 flat top and the igo-l I have less then 1mm gap, with taifun I have no gaps and battery rattle until I adjust my taifun pin
Photo shows a efest IMR flat top with the igo-l.
The gap between the igo-l and the top cap is not measurable as its to small.
omg its huge arrrrghh gaps noooooooooo
edit: is that a scratch I see on your igo