Thanks guys. I worked it out this morning and felt so embarrased. I plan to not put all the wort into the boiler at first and then add back in once some has steamed off. Is this ok to do?
I am also thinking about buying a grain mill because i read that crushed grain doesnt keep long but whole grain does.. is it worth doing?
That is exactly what I did with my 30ltre boiler. Kept 2 or 3 litres back and added them after about 1 hr. Beer came out fine. Usually ended up with about 25ltres in the FV.
One thing is to be careful not to over sparge to get a larger final volume. I fell fowl of this when I upgraded to a 56litre boiler and ended up with a harsh alcohol taste in the finished beer.