Geuzz: thanks for sharing your experience and opinion with us :+1:
Concerning the twisting action: we got what we asked for, as the threads are an exact copy of the Fenix E01 (C01 and E01 can ‘lego’), the twist resistance of the C01 is a deliberate design decision and carry-over from the Fenix E01.
After reading your post I just tested the twisting resistance of my golden and purple Fenix E01. The golden one E01 is even more stiff than all my four Sofirn C01s, while my purple Fenix E01 is slightly less stiff. Strangely enough, the golden E01 is was one of my most used lights (I carried it for over a year on my keychain, untill I received my Sofirn C01s). I can still operate all of them single-handedly, so I do not perceive any stiffness as a problem. Like djozz said, if the twisting action is too smooth, chances are higher to loose the head during everydaycarry. Perhaps also the length of the battery might be a factor in “stiffness” of the twist action.
Funny to read your kids took it to bath; my kids did as well, and they really enjoyed its waterproofness. :partying_face:
I have other lights where my kids did the same, which lead them to observe: “Look dad, there are coming bubbles out this flashlight.” :person_facepalming:
Edit: logical mistake, forgot NOT