The upgrade provides a noticeable improvement in airflow smoothness as well as significantly reducing issues I'd had with gurgling (though these could well have been due to user error - but in any event, much better now).

I have had the Lite tank for a couple of years and the biggest fault would be it leaked slightly ever so often. But this is an absolute game changer. The draw is better, the tank hasnt leaked on bit since and has changed the Lite from a good tank to the best tank. I couldnt recommend it enough to upgrade your Lite tank if you havnt done so. Its so good I will be upgrading my second tank to make them both faultless. 5 star service from Crem as always and the toffee's are always a bonus.

Gave my Kayfun new life. Airflow is much smoother, especially with the MTL pin. Should've bought two since I have another KFL.