This is indeed a good point, 2.5mm sounds better to me.
And this is a very nice suggestion, thanks!
We have about 20 springs, there's definetely room for experiments here.
5€ ??!

Hey man, it's already sold out, it's precious!
Thanks for the offer (and for the help, of course), but we are keeping it, we want to play with it a little bit more.
A Tilemahos owner saw the building procedure yesterday and was thrilled by the time it takes - don't know ... 30 secs?
Unfortunately we still have problems in flavor rendition. What I noticed is the first draw after leaving the atomizer still for some time is pretty good, the second is ...hm, and from the third the taste is actually ruined. Tried without any flavor, too, still the same.
I'll try to compress the internal coils, seems promising.
By the way guys, another question: how do you clean these springs?
I mean, ease of build is just one aspect of the whole story, albeit important, at the same time I need to be able to clean these springs quickly and without too much hassle.
I took one spring and tried, it went through the following steps (not a joke):
- boiling EtOH
- vinegar
- saturated solution of sodium bicarbonate
- coke (the soft drink I mean

)
- acetone
- isopropilic alcohol
- lemon juice
- soap dish + toothbrush
and... nope. No encrustations anymore, obviously, but the center is still black, while I'm able to get Kanthal wire back in pristine conditions with fair ease - at the least for the first days.
Thoughts? Suggestions?
(I have pictures, if needed I can post them, but believe me, next step to clean this spring is a nuclear explosion)