The coil in the RN4075 sits lower than the 901. This doesn't allow the cart to touch the coil. Therefore, MUCH less vapor. I just think that the suppliers should allow each person to make the decision as to whether they are okay with the RN4075 atomizers or not. Not just send them. It should be made clear, I have seen many sites that state what their products are specifically. I guess I will stick with those. Now I know.
That being said...Rob from AltSmoke Rocks!!!!
atomizer bridges poking up further with (some) later designs is one of the changes that have taken place.. some time back they were both the same height now they are not..
the problem is the chinese factories make these changes whenever it suits them.. their interest is mainly to sell new products.. rearwards compatibility isnt high on their agenda.. so what used to be okay now isnt okay.. its an ever changing thing..
but it is worse than what it used to be.. the difference in bridge height hasnt always been there.. its a relatively recent thing..
tweaking the wool higher kinda get around it.. the too loose or too tight cart factor is also a problem.. it pays to keep some older carts to make sure you have some that fit whatever atomizer changes take place..
these things are constantly changing in small ways.. the bits that come with a kit will match up but thats about it.. often the suppliers are not aware these small changes have taken place..
one thing we are noticing is bad threads.. some atomizers just wont screw onto a battery.. manufacturing tolerances seem to be getting worse.. we put this down the the chinese factories being overworked trying to meet an ever increasing demand for e cigs..
all is not entirely well in the e cig world..
trog
ps...
Actually I've read here somewhere that the 4075 coil burns hotter and gives much MORE vapor than the 901.
it does... noticably so... but it does need to fit the cart its used with..