Yo bro isaac! So how much was your modified CO2 cannister? Where on earth did u get it? Actually, I'm a little confused about this kg/L thingy. Some are quoting kg, some are quoting L. Is 1 kg equal to 1L? Also, aluminium cannisters are lighter than steel ones. So does that mean a 3kg aluminium cannister has more capacity than a 3kg steel cannister?