I’ve been very fortunate to have been gifted the system pictured with a tower of power. I had a two tier keggle system before so this isn’t that far from what I had—just everything is a lot nicer and the tower of power is amazing. So, only thing is it only has a sight glass on the MLT. I had purchased a sight glass last year and want to put it on either the BK or the HLT. I’m leaning towards the BK because I’m never quite sure what my fermenter volume is. When I mash in I measure out my strike water in the HLT, and have the sparge water heating up in the BK. Once I’ve mashed in I transfer the sparge water to the HLT. I could skip that step by having the sight glass on the HLT. What do you guys think?