well, i've spent most of the day reading the 200+ pages of stuff about making your own LR from salt and cement and great stuff and all sorts of things...
I think i'm just gonna get me a sack of portland and some rock salt and give it a go... at this point my eyes, head, brain, neck and everything else hurts from sitting here so long and reading all that...
heres the link to the tail end of what i think ended up being a 7 way split of 40 pages each split on making your own...
http://reefcentral.com/forums/showthread.php?threadid=1286738&perpage=25&pagenumber=28