I take it you mean 0.4Ω

I wasn't to sure if you'd come back with a positive response, that's good you have, it's def a keeper build, I've braided
5-10 now and i'm def getting quicker and tighter braids, although saying that, a really loose braid works just as good with
its extra coverage
Are you twisting up some heavy duty stuff? what are you vaping at?
maybe your mod, rba and battery need a clean or bat needs replacing, cant be that many variables, file or sand clean all contacts