I'm an extract brewer and have been collecting equipment for the last year or two to make the transition to all grain. Well I'm almost there but need your expert advice. I have 3 kegs with the tops cut out but no other modifications to them. I need some advice on penetrations before I start drilling holes. What should the BK and HLT look like? Where should the holes be drilled? Should I install a sight glass on 1 or both? I have a March pump with QD's so will be pumping between tanks. Pictures would sure be nice if you could. Thanks in advance folks!