
I purchased a 50L SS pot that also came with a 45L SS pot. I have never attempted a BIAB, only every doing partials on the stove top. I can't see any differences one pots size from the other pots size will cause other then maximum final batch size.
I have a large gas burner and am going to purchase some voile tomorrow to make my bag as per this sites tutorial on that subject.
My 50L pot has some ugly dents in it. I want my brew set up to look as neat and tidy as possible and reflect the amount of time I put into brewing so I think I will use the unscathed 45L pot for my set up. I plan to add a dial thermo, 3 piece SS ball valve and possibly a sight tube at some stage. I also plan to make a wind guard to go around the burner/pot, a stand to sit the pot on above my burner and a click on insulating jacket and cap for the pot.
Doing a few calcs on 'Brewmate' the difference between final volumes in a 50L pot and a 45L pot isn't massive. So I am happy to use the 45L pot for the sake of vanity
