Good Day,
I do feel the fustration you feel,
Belive you me, all are helpfull,
yet some times one might not get to understand others way of discribing how to get to some place or another,
but in all casses it is done with the utmost good intetion.
So please do keep it cool,
several answers given now are very well discribed.
Hope you you manage to get there, buy the cylinder and enjoy your first ( and all future ) BBQ's
SMILE... its very contages