i find it small too. when i started out
vaping, i need to changed the wick almost everyday, kept getting dry hit. then i watch sm YT vid n changed my wicking style, realising i've been putting too much cotton in it. i can take long drag on juice such as fanta grape n aj mango blackcurrant now. but still, when
vaping sweet juice like strap bandung, i still get dry hit.
here's a gd way to wick ur subtank 4 max vg:
though i wished i could drilled a bigger hole on it.