So, I've got an electric boil kettle that I'm going to move to mash tun work as an electric direct-fire. The problem is, the diameter of the kettle is non-standard, at least for the false bottoms I can buy off-the-shelf, and I have no idea how to make a false bottom myself, nor where to buy the parts. So, copper manifold seems like the way to go. The question is, what sort of hit am I going to get on my efficiency? Am I going to be more prone to stuck sparges?